I really doubt the transmission behind your 4 cylinder (ax5) will hold up to even a stock 302. If it were me I would probably get a t18 and a 205 out of an older ford and just swap the whole drivetrain. And youve still gotta deal with getting the efi wired in and a fuel system to run it. It will cost money to do the swap and be time consuming. The good news is just like every other swap concieved of, it has been done in a jeep. And the guys on here are more than willing to pass along knowledge if you need it. Welcome to the forum and keep us posted on how it goes.