I may just find a 360...would a chrysler 360 or 318 be the same?
Not at all. You would want an AMC 360. They can be found relatively cheap in older full size Jeeps (wagoneer, cherokee, pickups, etc). Only thing you may need is an AMC360 specific flywheel, if you get one that had an auto tranny. Other than that its as simple as take one out and bolt the other one in.
77 CJ-7- AMC 360, Edelbrock cam, MC2100, Fenderwells, CJ T18/D20, Chevy D44/EB 9" rear, Trutrac f/r, 4.11, SOA, 1.25 lift shackles, 35x12.50 BFG KM2s, Shackle Reversal