I am building a 1949 1 ton dump bed with a gmc 302 and the 4.11 from. 67-72 Chevy truck. Retaining the 4 speed and hope it will all come together. Will take my chance with the 302 as it is a totally rebuilt motor in a crate coming from an army surplus warehouse. I suspect though I will still fall behind the logging trucks on the hills around here.
