4 cyl T5 will live a short life behind a V8. I know a guy that got a bunch of passes at the drag strip with one (40 or 50), but it doesn't have the strength to live too long behind a V8.
Got an old beat up 4 banger T5 too and sticking with it... Busted my engine's timing chain (this is a non-roller block) before the tranny lol I also sort of busted an older 7.5 rear end from a GT that was once locked, until my foot hit the accelerator.