Yes you will have to relocate the spring perches no matter which vehicle you choose to install the C8.25 into.
XJ, YJ, an MJ. all are different. If you are looking for a D44 for the YJ spring over, find one from an Isuzu Rodeo.
'87 YJ, 4.2L built and bored, 8" of lift, 8.8 rear, AX15/NP 231J, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job. Never completed...