904 race build

Looking to see what is the most common parts to use on a 904 race build. Will be my first from doing 727s for many years. Don’t need a ‘pro trans’ and not taking it to a name brand shop, I can buy or machine any part. Let’s hear what you got. Thanks in advance.
Check the pics in my profile. I did my own 904 and lots of custom machining. Email me any questions.