A few people put a 3.3 in their 1/10th and it has little mods to put it in, if it were me i would get the sh engine. Ya its not the most powerful but its cheap. But if you have to like bk said the os cr-vs (i think it is, im pretty sure it has to be the short shaft) would be better, and the tz best for small blocks. But like i said it depends on the cash you got to spend.