Yeah its only a mildly modified 318 and aluminum 4 speed od tranny. I do plan on building a 408 stroker in the future but thats a ways off(probably 2 years ), plus I dont know if I'd stick with the 4 speed or go with a 727 instead. I would guess that the driveshaft length would be different with a 4 speed and a 727 tranny, right?