I have a 63 c10 with stock 230 and the granny 4 speed, I also have access to a 68 Saginaw 3speed with 3 grooves.
When I compare the ratios of 2nd on the granny and 1st on Saginaw, they are pretty close.
My issue with the granny 4 speed (I always start out in 2nd) is when going uphills the length of time to Shift from 2-3 or 3-4 is so long that I lose the RPM’s for the next gear to be effective and i end up downshifting to gain momentum. I’m thinking the Saginaw would allow quicker shifts in the power band rpm range and be a better option
Any thoughts or experience with this would be helpful
