Hedgehog,
that is what I am talking about. The 3.90 gear set is not a drop in for the AD pumpkins. However American Classic lists it as so and I talked to them on the phone. They gave me Randy's number to get more information.

I agree that 3.90 is not much different from 4.11 .

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed

My Chevy Master 4 Door is on the Road!