Wrightouch Automotive used to have an adaptor plate that would mount the 4G63 to the W58 (Mk3 Supra Turbo) tranny.

 

When I was looking into getting a 4G64 for my DSM a few years ago, I found that there are two versions of the engine. One that bolts to a 12.25" bell-housing, and one that bolts to a 13.25" bell-housing. The 12.25" bell-housing block is that one that will bolt to the DSM trannies. The larger bell-housing motor came out of the Mighty Max.

http://www.roadraceengineering.com/m...plications.htm

If you want to build up a 4g64 motor and mount it longitudinally, I say get the Mighty Max motor and tranny and build those up. Mount a 4g63 DOHC head on it too.

 

LOL i got my a$$ kicked by 1 of those at the track i was like wft is going on. i talked to him in the pits it had a twin turbo 3.0L SATURN motor. it went like 11.90's i never laughed so hard over such a toilet in my life. i was like its so stupid i love it. BTW he had like a 1.65 60' sorry its