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Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ

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Old 10-04-2008, 08:57 PM
jameskocsis88
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Default GM 350 wire harness in a YJ

I am in the middle of my first conversion and i need to know what harness to use from painless. I have a 86 GM 350 small block with a holley truck avenger electric choke carb. Any additional info for this conversion will be great.
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Old 10-04-2008, 11:33 PM
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For an older carbed GM V8 I wouldn't spend the extra $$$ on a painless harness unless the YL harness is totally messed up. FI is different, but with a carb you only need to hook up the alt and battery correctly and the HEI.

It will be easier if you have an early YJ that was carbed, but I would go buy a good manuel for both and work it out from there. The alternator should hook up just about the same, in fact you can probably run the YJ alt on the GM V8.

For pulling power to run the HEI, there is a 10 gauge red wire with white tracer that goes to the ign box on the early YJs that is a good source for the HEI. Tap into that and you should be good to go. I cant tell you where to go for power on the newer YJ's, but it should be pretty easy without having to mess with FI.

For gauges you can go aftermarket mechanical or simply install the Jeep senders into the GM block and use the YJ harness.

Oh... welcome to the BBS, stick around and search past posts... this place is full of good info.
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Old 10-08-2008, 07:20 AM
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When I put the 350 (carb) in my YJ I got the painless universal harness and I am so glad I did. Wiring up my jeep was the most intimidating part of my build for me, and the painless kit that I got made me feel much more comfortable about. For me it was well worth the money.

My 91 YJ had/ has a GM ignition, so I got the 12 circut harness for a vehical with a GM ingnition switch, and the manual that came with it walked me through the entire install.
If you are even a little intimidated by wiring, I would suggest the painless kit.

Good Luck
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