First you need to know about the emissions laws in your state and what restrictions it puts on engine swaps.
I put a Chevy TPI in my CJ, but it was pretty simple. No inspections in Kansas, so that wasnít a problem.
I already had the T-176 transmission, which was strong enough to hold up to a larger engine so it was a matter of buying a bellhousing that bolted them together. I also had to buy a wiring harness and have the exhaust done. Iíd already swapped to a 3-core radiator when a solder joint came loose and let the old radiator go into the fan. For me it was pretty simple but I did a lot of research before I attempted it.
I donít know YJ so youíll have to look into what transmissions you can use or if yours will handle it. Itís a pretty common swap so you should be able to find a lot of information on it. Do the research and do it right and youíll enjoy it. Fail to do the research and go at it haphazardly and youíll likely be trailering it to sell as scrap.
There are 10 kinds of people in the world.
Those who understand binary and those who don't.