I still run a 727 but the only thing not billet was the output shaft but it's back at my trans builder getting new gears and a billet output shaft and the car is 3800 lbs on 275 radials. I'm similar to you as in I've backed myself into a corner with this box with the amount of money that's been spent on it. If I had to do it again it would definitely be a GM style trans, similar money ( bit dearer), but more ratios to choose, SFI cases and especially over here more parts availability.