I'm gathering parts for my 400 swap into my 64 Valiant now. I am going to use the later spool type mounts and just make brackets that bolt right to the mount pads on the K frame. It appears from all the measurements I have taken and pictures that
@pishta so graciously sent that the factory C body HP manifolds will work. I don't know for sure yet, as I am still driving the car with the slant six right now. I'll put it this way. I'm gonna "make it" work. I need a 10.5 bellhousing to fit an big block for the A230 three speed. That's gonna be my biggest hang up.