Join Date: Nov 2002
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Re: 350 Engine Swap
I don't know a lot about YJ's, but some of the things you didn't list that you need to think about are:
TRANNY what do you have? Most factory Jeep trannys won't hold up to a healthy 350 for long. If you have a good tranny then price an adapter bellhousing or a tranny to bellhousing adapter. And along those lines, if you need a beefier gear box, you'll need to look at adapter prices for the t-case which run a minimum of about 400 bones plus the cost of your tranny.
AXLES If your factory, the Dana 35 won't withstand V8 punishment for very long either. I've run my Dana 30 for a while in front of a 350, but I'm pretty light on the skinny pedal and I'm still just waiting for it to go.
COOLING Your 4.2 radiator may or may not handle the cooling of a 350 (mine does fine, some of the guys I go with had to go high dollar conversion) but at the very least you'll have to have the return hose on the bottom switched over.
MOTOR MOUNTS Someone else will have to pipe in here. I built mine, but there are alot of quality and fairly simple mounts out there.
Lastly, If your going to do it, think about a factory motor with FI (alot more work with wiring, etc... but you'll probably want to do it down the road anyway).
I love my V8 Jeep, but its kind of a constant project, and anytime anything breaks, its a bit more of a headache to fix. Just my .02 on the matter.