I just built a 51 3100.
Has a stock 1954 235.
1964 truck 3speed std transmission and a 1964 12 bolt truck rear end with 3.73s.
I don't have a tach so I'm not sure of the RPMs, but in 3rd at 40mph shes wound out, the tallest gear ratio I can find for that rear end is 3.08s (I'm afraid anything taller will lug the 235 anyway)
Does anyone have an idea of how many mph I will gain by swaping the 3.73s for 3.08s? I'd like to cruise 60 decently. But I don't see me gaining 25 mph with that swap.
Or maybe that transmission is geared funny and I could get a different 3 speed that would help the situation.
