Stock engine only - 2JZ
Stock car only - R34GTR - personal choice but IMHO they do feel a lot more modern, and a better drive overall, if rather slow and heavy.
Mildly modified car circa 500bhp would be Supra purely because it drifts great at this point and all the JZ'd cars I have driven always feel so effortless
Outright modified engine would obviously be the 2JZ as its simply sooooo strong and the extra cubes help - and before someone says RB30 dont forget you can take a JZ to almost 4 litres if you want !!
Outright modified car would still be R34GTR, purely because I'd want the extra control Attessa gives, and still retains basically RWD behaviour but with the ability to extract more performance more of the time than the Toyota !!
Ideally have a couple of each
J.