I have a 65 c-20 with a 4 speed transmission 230 inline 6. We all know these trucks are low geared. I found a browning 3 speed that I'm going to add. These boxes come with different percents of overdrives. I thought about 15% would be about right but I would like some advise from someone who as done it. I will later be building a 292 for it so the best to use with that motor would be helpful. I think a old school two stick is goin to be cool as hell please help.


Bob