Gotta agree with moper...stock type build 904 won't last. Build it with the right stuff and it works great and will last. Chris from Andrews Racing Transmissions is a great source for info and parts. He knows what he is talking about.
I got great advise from Chris Andrews and handed it over to my builder.The 904 is doing fine behind my 410(around 500hp) running 11.20,s in a 66 Dart.People frown upon the 904,s,but as said if built right can perform well.:cheers: