I would have either the entire 4.0 rebuilt if I went that route, or just the head rebuilt if I went that route. I'm definitely not putting a non-rebuilt engine in the CJ.
Doesn't the 258 have more torque at lower RPMs?
Has anyone ever had the 4.0 head/258 block combo on a dyno to actually see the results, instead of estimates? I've read that this combo gives you the best of both worlds, but I haven't seen any data to back it up.
Where can I find a write up on this online? I've junked out 5 or 6 cherokee/commanche trucks in the last few months, and didn't realize this was worthwile.. I don't want to tie up this post with with this is good and such, but a websight about it would be cool.
__________________ 1988 Wrangler 89000 miles, no rust, no rot, all nice and pretty.. Runs down the highway really nice too.. This is great fun.
Its really worth getting the 4.0 (or head swap) in a old cj. I love mine. Nothing like reaching in the window and turning the key an having it fire right up. You can follow my build here: http://novajeepers.net/index.php?topic=819.0