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Old 12-14-2001, 07:32 PM   #1 (permalink)
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vortec 4.3 swap

I am installing a 95 vortec (tenatively) in my 83 toy. I am going to use northwest motor mounts due to adjustability and quality, but are there any others who make gm auto adapters besides AA??? Also I have a 4L60E tranny attached to the motor(out of a s10 blazer) I will be using (with stock wiring harness), its 2 wheel drive, is this a compliccated issue, can I use it??? I also heard about some issues with exhaust manifold clearance, any clarification on that or any other related stuff would be helpful!!!
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Old 12-17-2001, 05:10 AM   #2 (permalink)
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AW CMON!!?? Any input as to the engine, it being the CPI version as opposed to the TBI version???? Has anybody used this engine?? (in a toyota, seen them in zuks)
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Old 12-17-2001, 05:26 AM   #3 (permalink)
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the newest toyota trails has a good article about the different 4.3 motors and what's needed to swap. the advance adapters swap book has some good information. there's also a book about swapping chevy fuel injection motors that downey/aa/speed shops sell that has some good information.

i'm swapping in the tbi unit because it's simpler. the vortec has 4 o2 sensors(before and after the cat) and more computer inputs/outputs. if your good with figuring out wiring and stuff(this is what i do for a living, building automation systems) then either motor is a great choice. you can get premade harness's from Centech/ron francis/painless/howell. just go to there sites and do some reading.

www.centechwire.com
www.wire-works.com
www.howell-efi.com

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Old 12-17-2001, 07:22 AM   #4 (permalink)
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I'm dumping a '98 Vortec 4.3 with custom harness into my '84 in January. Built 700R4 behind it, AA adapter, etc. Motor is OBDII certified which adds a ton of crap to the harness. I had Fuel Injection Specialties in Texas thin the harness for me. Now I just hook up 5 wires and it runs!!! The older 4.3 TBI harness are easy to make stand alone. You can to them your self.
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Old 12-17-2001, 08:14 AM   #5 (permalink)
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I completed my 98 4.3 recently, and used everything stock from the radiator and shrouds to the back of the 4L60E. I have the chevy radiator in the stock location, and the chevy fan with plenty of room. I used a 3 inch body lift to make it easier to fit, but it could probably be done without the lift, and lots of firewall pounding instead. I used the chevy in tank fuel pump, grafted into the 82 gas tank. I will probably add another tank soon, cause 13.9 gallons isn't much for a 4.3. I used all the stock chevy fuel hoses and pipes, just rebent as needed. I used the stock underhood fuse box, and thinned wires from it as I was able. You will most likely have to pay someone to install a new Advance Adapters output shaft into the tranny. The adapters are prtty pricey, and the swap is a lot of work, but when you are done, WOW. On the exhaust manifolds, the passenger side worked fine, but I had a good welder cut and turn the output on the driver side, to clear the frame rail and the ear on the tranny.

If you have any questions, just holler.

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Old 12-17-2001, 08:58 AM   #6 (permalink)
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on the 98's isn't there a security thing in the computer you need to bypass or something? i was told to get a computer for a 97 if i was gonna go that way. the place where my truck is also has a 98 vortec but it seemed to damn involved compared to the TBI that they had also.

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Old 12-17-2001, 09:47 AM   #7 (permalink)
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for headers i used sanderson block huggers. they fit great. if you are using the auto tranny then (i hate to say it) the nwor headers will work.


ya it is alot of work and you will run into lots of issues that you will just have to work out one at a time as they come up. just plan on it taking twice as long and costing twice as much as you origanly thought.
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Old 12-17-2001, 09:54 AM   #8 (permalink)
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how much did the sanderson heaaders cost you?

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Old 12-17-2001, 10:12 AM   #9 (permalink)
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http://www.sandersonheaders.com/pagesbypartnum/cv95.htm
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Old 12-17-2001, 10:37 AM   #10 (permalink)
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How much did the swaps call you guys after evertything was said and done?
I met a guy this weekend that said it cost him $9000
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Old 12-17-2001, 11:33 AM   #11 (permalink)
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On my 98, there was a Vehicle Anti Theft System (VATS) I had to pay a shop in Oklahoma I think it was about $350 to modify the computer. At the same time, they did all the performance mods for the computer and tranny shift points.

My total cost for the swap would be:

$1500 for wrecked 98 Bravada.
$900 or so for adapters to toy tcase.
$115 for motor mounts NWOR.
$21 to replace cracked valve cover.
about $300 to swap tranny output shaft.
$59 body lift.
$350 for computer mods.

Total $3,245, but there was lots more little stuff.


I also did a D44 swap, Tacoma rear axle swap, Saginaw steering swap at the same time so my cost went way up.
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Old 12-17-2001, 12:17 PM   #12 (permalink)
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Thanx guys, I got my CPI 95 4.3 with 4l60 tranny and all stock eng components including computer and acc. for 800$. I think maybe the painless wiring harness will set me back like 400, the NWOR motormounts, and Im gonna have Sunray mount the adapter and install the output shaft (they make them), also the tranny needs moded for vss since mine is a 2 wheel drive and its in the stock tailhousing. Just need to get headers. I was unsure of my version 4.3 being a pain, but its still OBD1, and the painless harness is prob worth the money as they are local and could provide help if needed (wiring scares me). Gotta get this done for Johnson valley trip, never been out west, good excuse to go!!!
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Old 12-17-2001, 12:18 PM   #13 (permalink)
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Im also tryin to figure out how to squeeze the budget to get this guys NV4500 with adapter, that would be sweet, but funds may not permit!!! Tryin to work out some tradin though!!! Anybody got any pics of the exhaust manifold mod???? Im havin trouble visualizing what the heck we are talking about!!??

Last edited by jslamerman; 12-17-2001 at 01:34 PM.
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Old 12-17-2001, 04:37 PM   #14 (permalink)
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I did a '95 4.3 CMPI from a Blazer...I used stock exhaust manifolds and made my owm motor mounts(really easy--square tubing to fit the factory rubber engine mount and a flat plat welded to it to bolt to the Toy frame)...I used the GM fan and serpentine belt system, Painless wiring harness(which uses the little silver computer and not the big black box I got with the engine), I use the stock Toy fuel pump, but am considering switching to the Ford inline unit....I run the Toy 5 speed and spent about 600-700 at Hicks for the AA belhousing, flywheel, CF clutch, etc.......I also made my own Tcase X-member....I switched to an LC clutch MC to operate the LC slave that came with the kit...If I had a 700R4, I would have gone that route....Ricktard is planning to go that direction, but I'm not sure what intake system he will use.....
I also used an air filter box from a Buick that mounted to the passenger fender and has an opening that faces the firewall, perfect for a snorkle....that will wait for the 'glas fenders and those will wait for the SAS.....lots of crap for a DD that was only offroad once in the last 24 months and that was to run in some mud in the field by my house after I finished the swap...I'm super slow at getting stuff together, it only took me 19 months to do the swap(LOL)...only get to work on Sat and several months I didn't even get to LOOK at my runner....
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Old 12-17-2001, 07:15 PM   #15 (permalink)
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got the rear springs for the 84 4 runner I have, and am selling, from ricktard, talk about a torn apart runner, goin to some SERIOUS axles! The computer I got with the motor is silver, and is maybe 1" thick, maybe a 6" by 7" rectangle(?), whats the diff with the computers??? I have heard this several times before, and have no idea what people are refering to??????
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Old 12-17-2001, 08:03 PM   #16 (permalink)
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The earlier and simpler computers were the silver 1" by 5 inches wide by 8 inches long or so, and had maybe 10-15 wires. The later computers like mine are about 3 inches thick by 10 inches square or so, and have 4 plugs of 25 wires each. Mine actually had 90 some wires going into it.

If you have some time, check out Fuel Injection Specialties web site for lots of good info. But beware, they cannot remove VATS from your computer. I found another company in the midwest that could for a bit of money though.
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Old 12-18-2001, 03:43 AM   #17 (permalink)
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what's the website for fuel injection specialties?

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Old 12-18-2001, 07:25 AM   #18 (permalink)
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It is cheaper to just get a '96 computer without VATS then to pay $300 to have it removed. We picked up a used computer from a yard for $75.

The adapter kit for the 700R4/4l60E from AA cost me $475 at the local 4wd shop. $100 for mounts and that was it.

We used almost everything off the s10 including exhaust. Everything bolted right in. Some tweaking here and there but nothing major.

Fuel Injection Specialties
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Old 12-18-2001, 10:22 AM   #19 (permalink)
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thanks chad, your up in the lancaster area?

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Old 12-19-2001, 10:11 AM   #20 (permalink)
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Yeah, just north of Lancaster about 10 minutes. Let me know if you need any help.
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Old 12-19-2001, 10:52 AM   #21 (permalink)
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anybody got any pics of the exhaust mod(angle to be cut) ??????
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Old 12-19-2001, 07:01 PM   #22 (permalink)
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Hey, whats up Jslamerman. Man u thought u saw torn down, you should see it now. I am almost ready for assembly, but I need a few more things. Hey 4runner, u need to come check it out. I got my new tires and wheels last week "BAD" . Sorry to dissapoint, but I went 350/350, and I am currrently saving for an Atlas II 3.8. . My 350 I had bored .040, and I need to put it all back together. So I now have a fullwidth Dana 60, and 4.3TBI taking up shop space. Oh yea, switched to 14 bolt rear. Long way to go, but its going. I will post some pics soon. Later guys
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Old 12-20-2001, 05:34 AM   #23 (permalink)
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Ha, Ricktard, saw the light!!!! Drillin those spindles isnt as easy as you thought on that D60??? I have an xtra 14 bolt with 4.56s and a Detroit for when I get sick of breakin toy axles!! The 84 4runner u saw is goin up for sale , need cash to finish the J10, and the 83 bodystyle jus doesnt bring the cash, so Im keepin it, and if youve been readin, puttin in a 4L60E and a 95 vortec v6 (210hp CPI!!!!) from a blazer a buddy pulled for me. I still want that driveshaft and those rocker gaurds!!!! (For the 83, wanna move the axle forward)I also am still looking for a pic of the exhaust mod, ANYBODY??

Last edited by jslamerman; 12-20-2001 at 05:35 AM.
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Old 12-20-2001, 06:51 AM   #24 (permalink)
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Post Vortec 4.3 Swap

I swapped a '94 CPI 4.3 and 700R4 into my '85 4Runner. I used AA headers, which I had ceramic coated, along with NWOR motor mounts, Howell wiring harness (just plug in and go) and had my computer modified by Ed Wright Automotive in Tulsa. For the radiator, I had a local shop swap the inlet/outlet hose openings on a Toyota V-6 radiator, and ran custom 2.5" exhaust. For the t-case to tranny adapter, I went with AA. On the interior, I used a B&M Megashifter in the stock console. Sam's Off-Road custom made my A/C lines and put a fuel pump from a '97 Chevy truck into the fuel tank, along with larger gas lines.

Even after selling my 22RE and 5-speed, and adding in all the little miscellaneous items, I probably had around $4500 into the conversion.
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Old 12-20-2001, 11:04 AM   #25 (permalink)
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how is the fuel pump modded to fit in the tank, and why a 97??? I was also wondering about the gas gauge, Id really like it to work finally, it hasnt since day one (1995) that I got the truck!!!!
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