1/4 Mile Estimate
If built right( nothing special really) the 904 will live forever in a low 11’s car. You address the converter hub issue, put 5 clutches in it, get multi spring pack or reverse wound spring and take care of the servo pistons. Good bands/strut. Live forever. Most of which you need to do to a 727. Plus 904 is safer to a degree. I’m running Copes DIY 904 kit in my car for 3 years. Change the fluid each year. Comes out bright red and clean.