Which engine? The 2.0/2.4 engine, of course! Why pay more for an engine that isn't as robust and doesn't make as much power? The 2.4 is tried and true; many TD'ers run them and they prove to be reliable and most importantly, CHEAP! You can MegaSquirt it fairly easily, just as Una, who posted above /\.
I don't believe there are any RWD 2.4 (New World Design) applications, but I believe a certain year of Supra trans can be mated to a 2.2/2.4 engine - other members would have to chime in on the specifics of that.
Cheers, TheCanadian