I have loads of street miles on a Turbo Action 8" 4500 when I had my 727. My 904 had a 8" 4800 until the snout broke but that is getting repaired. The 4500 behind the 727 flashed to about 5500 and the 4800 with the 904 flashes to 6400. I did 5 drag weeks with the 727 converter and 1 with the 904, car weight on the road for drag week is around 4000ish.

The street manners of them don't bother me at all.