Don't do it unless you are going to use an auto! You have to do massive mods to the tunnel to clear the 6spd, and it all will require Engineering. Cost of Sump, mounts, Extractors and other bits alone will be close to $2000. Castlemaine Auto Electrics have plenty of info if this hsn't scared you off yet!

If I were you I'd stroke the VS engine to a 350/5.7 and get the Memcal modded to suit. You'll have to get rid of the Supra box though as it will be lunched very quickly by a 350ci Holden V8.