Fits like a glove. get the B&M 10239 flexplate (to maintain the OE external balance). look for a used one (cheaper) & they dont wear out. As said if the 904 is an early one get one of those spacers for the crank register. I've heard of people going without but I would do it right. Doug Dutra used to sell em then later wildcat auto did. EDIT I think someone on one of the /6 sites would know a source as they do alot of later /6's into earlier A bodies. I have one if you need dimentions to machine one.
