I think 4.56 would be as high as you could pull with the 19.5 tires. Some of those 5 speeds were 5th over but most were direct in 5th. It is a huge heavy trans. I would stick with the 4 speed.


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.
1972 Chevy c10 Cheyenne Super
In the Gallery Forum