Not an owner of a Supra, but have worked on many MKIII's at the dealer level as a Toyota tech.  My primary interest is the possibility of some kind of engine conversion using the 1JGZ or 2JZG.  One possible candidate I have among my project cars is a 73 240Z.  Until now I had thought about keeping it all Datsun (tend to be a purist with some of the older sporty cars)   but the idea of running  one of the JGZ engines in the Datsun is intriguing.
At this point I have been a lurker,,,keeping an eye out for ideas
			
			At this point I have been a lurker,,,keeping an eye out for ideas