727 limitations

Personally I’ve seen up-to 1000hp run thru a 727. Heavily modified of course.
With a good trans shop and proper parts I’d be safe at 750hp all day long.
Since the days of my youth and with today’s technology I would not quote you any parts outside information written by Chrysler in the old DCC engine and Chasis books. Get a copy of those and start there. They are a wealth of excellent proven information to start with.
syleng1