Ok....904 and street abuse

If you drive it like an adult human with an occasional WOT application, I wouldn’t worry. I wouldn’t plan on 70-80 foot burnouts with it.

If you have some time left on the 727, it might be a good idea to step up (If $$$ allows) and build up the 904. Tell the shop it’s going to see a honest 500 hp. Have them out in a shift kit and add a deep pan. Call it a day.
If you can.