My 350 has good parts in it, I used to rebuild transmission's for a living and there was a guy I worked with that could build one hell of a 350 or 400 so I had him build my 350. I told him it needed to be tough and he told me it should handle 500hp no problem so I think im good on that end, its only been drove on for 2 summers and not I didnt beat on it really when I drove it. Im not planning on putting it on the track with slicks, IF i put it on the track it'd be with maybe some drag radials at the most.