The gears in my truck are not stock to 1957...I swapped them in when I got the truck and I have no idea what they were in originally. The junk yard had lots of truck third members hanging on a rack and I found this one that fit my rear housing making it an easy swap.
I'm turning about 3500 rpm at 65 mph. If I push it to 70 I start bouncing off the governor which is set at 4000 rpm.
Mike B
