Check out this 3000GT for sale on EBAY, he's using a turbo 400 with a montero flywheel, Montero bell housing and a custom adapted torque converter and adapter plate, the plate was home made, basically just a plate of aluminum with holes drilled in it. the torque converter was made by BTW performance.

All in all he told me it wasnt that expensive. and it would solve a lot of problems for people. For you i know many people mix match clutches to adapt different transmissions to their cars..

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&viewitem=&item=230207120953

Oh that reminds me, i was going to ask you what coil springs you're using in the front and what leaf packs you have in the rear. Your pictures on your page are very helpful but they're SOOOO SMALL!! got any high res pics?