Why not put a Supra motor in it? well, why does someone put a SBC in a Turbo Buick? For the same reason I guess to go a lot faster.... You could run nearly 1300 hp on pump gas for one. Second, one could run 2000+ hp on race gas. The V6 will certainly make a lot of hp since we have all seen 7 and 8 sec. Supras but with 2 extra cylinders your just gonna run more power....period!
It's not a street car. Neither is any of the 7 and 8 second supras. So who really cares whats in it when ur a hard core class racer. Its just about times. None of the cars running those HP levels have factory motors. They all put giant cubic inch motors in them.
I think the car badass. First time I have seen a swap like that.