if youre considering it for a conversion, its not really a do it at home type..
gen 1.. not around much.. st16x? 4wd celica..
gen 2 is in early sw20 and st185
gen 3 is late sw20, caldina, st205
they have the potential to have oiling issues.
youll need to mod/swap the sump. depends which version you get as to what you do there.
youll need a custom/modified flywheel/clutch combo to run it rwd, or a full kit meant for a sxe10 (altezza)
bolts to w55/7/8 using sa63 bellhousing, or MODIFIED 3Y.
dizzy points out the back of the head.
water inlet at rear of head.
intake unsuitable for rwd.
turbo position unsuitable for rwd.
obviously custom x member/engine brackets and GB x member & tailshaft.
better than an sr, and cheaper, but alot harder conversion.