I thought I struck gold when I was able to remove the single speed 7.20 :1 and installed the 6.40/8.70 or whatever the ratios are. It changed my road speed by 10 mph in high range. Not that I expected highway speeds but I can now keep from upsetting folks on the 55 mph two lane, it'll do about 62 mph wound out at 4000 rpm.


1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy