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Old 02-03-2007, 02:15 PM   #1 (permalink)
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350 Vortec to TBI454

Got offered a pretty sweet deal on a 92 full size Blazer. Motor, trans, and dash all out of a 96 truck. Motor has the Vortec stuff on it, computer intake, etc. The trans is a 4l80. I want to take the motor out of my 89 with a TBI 454 and put it in this Blazer using the 4l80. I dont' know too much bout this trans, but I know that it needs a computer to run it right. Being a 96, does it use a stand alone ECM, or does it still tie in with the motors ECM?? What would be the best way to get this motor in the truck, and still use the tranny?? Or should I just say fuck it and keep the 350, or use the 400 that I have sitting in the garage??? Tho I REALLY want to use the 454. I think a TBI 454, 4l80, 203/205 doubler, HP60, 14ff with 4.56s on 40" boggers in a 92 Blazer would be pretty damn cool, not to mention a killer wheeler.....
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Old 02-03-2007, 03:12 PM   #2 (permalink)
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the 96 engine uses OBDII and the 89 is OBDI. your 92 is also OBDI so it could go together and work with minimal issues. trying to get the OBDII stuff to work in a pre 96 vehicle is possible but takes a lot more work than an OBDI.

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Old 02-03-2007, 03:33 PM   #3 (permalink)
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Are you certain that it is a 4L80e and not a 4L60e tranny???
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Old 02-03-2007, 03:34 PM   #4 (permalink)
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I don't think that I will be able to use any of the 96 stuff, except the dash. Think that I'm gonna have to find either the ECM and harness for a TBI 454 with the 4l80, or a stand alone ECM for the 4l80.
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Old 02-03-2007, 03:40 PM   #5 (permalink)
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Are you certain that it is a 4L80e and not a 4L60e tranny???
Yep. Truck was a 3/4 or 1 ton.
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Old 02-03-2007, 05:15 PM   #6 (permalink)
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Cool. I went back and re-read the initial post...and saw where I assumed it was a 1/2 ton donor truck.
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Old 02-03-2007, 05:41 PM   #7 (permalink)
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looks like the only way to do this is to either get a manual valve body, or ECM and harness from a truck that has this combo, TBI 454 and 4l80e. Need to get the throttle body itself off a 454 with this trans, as mine has no provisions for a kickdown cable. Thinking the manual v/b might be the cheapest and easiest way to go.
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Old 02-04-2007, 04:37 AM   #8 (permalink)
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Anybody have anymore input??
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Old 02-04-2007, 10:27 AM   #9 (permalink)
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As I recall, from my research into ECM's/PCM's when I did my engine swap, the '94/95 truck PCM for a 1/2 ton automatic will support either the "60E or 80E" trannies, and of course, the TBI injection system. Fuel tables in a 5.7L PCM would need altering to match the 454's needs--or maybe a 454 was available in '94/95, in which case, that would be the PCM to use.
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Old 02-04-2007, 11:11 AM   #10 (permalink)
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They made this combo starting in 91, and ending in 95. 96 was the first year of the Vortec. Once I get the truck, make sure it runs and drives good and such, I may trade the trans and motor for a NV4500. Have to get the truck first. I have a friend that works at a late model junkyard, might be able to get something from him.
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Old 02-04-2007, 01:34 PM   #11 (permalink)
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thought of using the 400 short block with the existing vortec heads, intake, injection and electrical system?

id say a 400ci vortec would come close to 454 tbi power and you wouldn't have the heavy ass big block weighing you down

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Old 02-04-2007, 03:12 PM   #12 (permalink)
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thought of using the 400 short block with the existing vortec heads, intake, injection and electrical system?

id say a 400ci vortec would come close to 454 tbi power and you wouldn't have the heavy ass big block weighing you down

I was thinking about this. I had a couple 400s and loved them, but I also love my 454. I was saving the 400 for my 62, but I might have a line on another one. If it wasn't so much of a PITA to put the 454 in my 62 I wouldn't even think otherwise. It looks like the 400 would be the best, cheapest and easiest way to go. Not inless my buddy can get lucky at the junkyard.....
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