77 cj5 304 carb -> 258 efi swap wiring question - Pirate4x4.Com : 4x4 and Off-Road Forum

gearhead313 · 05-08-2008, 05:20 PM

I have a carb 304 77 cj5 and am in the market for a new drivetrain setup. The wiring in the whole jeep is completely butchered, so i was looking for harnesses.

I found this on ebay:
http://cgi.ebay.com/ebaymotors/ws/eB...id=p2759.l1259

Could I get the correct 258, use that harness and just wire up the interior? will I have to use the 86 guages? will the speedo need swapped? Just looking for some definitive information to weither this is worth it or not! Thanks!

crashnzuk · 05-08-2008, 05:52 PM

That harness is for a carbed 258 (4.2 not 4.0). Why would you want that? You could buy a universal Painless harness or similar. I wouldn't swap out a V8 for a wheezing 258.
Travis..

gearhead313 · 05-09-2008, 01:18 PM

Right... thats no good then. I didnt want to spend the money on a painless, so I was looking for other alternatives..

ddestruel · 05-09-2008, 02:36 PM

Put TBI on that poor old 304 and be done

gearhead313 · 05-10-2008, 05:51 PM

its smoking so bad.... the motors coming out. Just looking for an alternative...

billcrawlin · 05-11-2008, 09:52 AM

I bought a junker xj for $500 and swapped the head, intake/exhaust manifolds, and wiring harness onto a rebuilt 258 in my yj. Has been running good for a couple years and i was able to pass CA smog.

gearhead313 · 05-14-2008, 03:17 PM

how far did the wiring go down the jeep with the injection?

05-08-2008, 05:20 PM	#1 (permalink)
gearhead313 Registered User Join Date: Jan 2004 Member # 26225 Location: Chicago, IL Posts: 218	77 cj5 304 carb -> 258 efi swap wiring question I have a carb 304 77 cj5 and am in the market for a new drivetrain setup. The wiring in the whole jeep is completely butchered, so i was looking for harnesses. I found this on ebay: http://cgi.ebay.com/ebaymotors/ws/eB...id=p2759.l1259 Could I get the correct 258, use that harness and just wire up the interior? will I have to use the 86 guages? will the speedo need swapped? Just looking for some definitive information to weither this is worth it or not! Thanks! __________________ RIP

05-08-2008, 05:52 PM	#2 (permalink)
crashnzuk Registered User Join Date: Mar 2003 Member # 17632 Location: West Sacramento, CA Posts: 5,418	That harness is for a carbed 258 (4.2 not 4.0). Why would you want that? You could buy a universal Painless harness or similar. I wouldn't swap out a V8 for a wheezing 258. Travis.. __________________ 74 Ramcharger, 360, 4spd, 60/70 on 37s 91.5 Dodge 6BT 5 spd tow rig

05-09-2008, 01:18 PM	#3 (permalink)
gearhead313 Registered User Join Date: Jan 2004 Member # 26225 Location: Chicago, IL Posts: 218	Right... thats no good then. I didnt want to spend the money on a painless, so I was looking for other alternatives.. __________________ RIP

05-09-2008, 02:36 PM	#4 (permalink)
ddestruel Zeus of the Sluice Join Date: Jul 2003 Member # 20999 Location: Lost in Nor Cal Posts: 2,827	Put TBI on that poor old 304 and be done __________________ I AM ONE OF MANY WHOM WASHINGTON HAS CHOSEN TO IGNORE OR FORGET But i Vote GO UM Montana Griz "Jeep Lurker" KEEP REMEMBERING 9/11 Jeep with Rambler motor, SUA, front 608.9 and some bolt on stuff. I miss my old 4bt powered chief Support Frank the Tank

05-10-2008, 05:51 PM	#5 (permalink)
gearhead313 Registered User Join Date: Jan 2004 Member # 26225 Location: Chicago, IL Posts: 218	its smoking so bad.... the motors coming out. Just looking for an alternative... __________________ RIP

05-11-2008, 09:52 AM	#6 (permalink)
billcrawlin Registered User Join Date: Jan 2008 Member # 107189 Posts: 30	I bought a junker xj for $500 and swapped the head, intake/exhaust manifolds, and wiring harness onto a rebuilt 258 in my yj. Has been running good for a couple years and i was able to pass CA smog.

05-14-2008, 03:17 PM	#7 (permalink)
gearhead313 Registered User Join Date: Jan 2004 Member # 26225 Location: Chicago, IL Posts: 218	how far did the wiring go down the jeep with the injection? __________________ RIP

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