So after my first trip to the track I blew up my c4 Ive been having chronic problems with it since we hooked the 331 up too it, its a stock tranny with a shift kit and 3200 stall converter The engine is making over 400 hp and whenever I run it hard for a little the trans starts blowing oil through vent and dipstick. I ran it down the track twice and it was fine. It wasn't till the 3rd run. When it shifted 2-3 it started slipping and trans oil sprayed out. Now it has no 3rd and I have a problem going into reverse. it shifts " Ok" into 1-2 but when it goes up to 3rd it just free revs. Now I understand that there are a million things that could of went wrong but does anyone know of a good overhaul kit to go with? And whats the differences with all the kits? I wanna do a complete refresh but change out key components so it doesn't fail again. Ive done some research on it and looked into forward clutches etc... Im going off to college soon so this is most likely going to be a budget build on the tranny. What is really necessary for a 450+ hp build? Hardened input shaft? Clutches? Performance Auto has a kit for like 250$ but is that going to have all the stuff I need? I should be picking the car up from my dads shop in the next couple of days.. Crossing my fingers that there is no metal in the pan!