I put a 4" forged crank in my 360, left everything else the same, except for a 4.10 gear now instead of 4.30's. The 4.30 was going to wind it too hard. It crosses at 6550 now. This is in a Dart which I bracket race. It now runs 10.80 at 121.5mph and with the 360 it would be 11.0 at 119, so I feel disappointed with all the money spent for so little et improvement. I wonder if I expected too much? What do you think?