I believe the cressida has the sump in the middle. You may have to source an oilpan and sump before you do the swap however CAZ has done this swap I believe and he could tell you more about this.

Here are some sites I found:

http://www.off-road.com/toyota/tech/supraswap/index2.html

http://www.yotapower.com/4runner/7mswap.htm

http://www.4x4wire.com/toyota/tech/supra/

(aka suprathepeg, aka Sean)
89 v6 SWB truck "BLACK BEAUTY" EB valves, P&P head 30 over.
95 FZJ80. Lifted. locked and rollin on 33s (my dream machine)