speedmaster 3 gear ratio

[ovrkll77]

anybody know what they came with. I am building a blown 632ci and want to find out what ratio to go with

[BDMar]

III
1.50, 2.00
III SSM
1.00, 1.18, 1.25, 1.33, 1.40, 1.50
IIIA SSM
1.00, 1.18, 1.25, 1.31, 1.33, 1.40, 1.44, 1.50
Not all the gears are available new anymore.

[ovrkll77]

so how would I know what model drive I have?

[BDMar]

The III is a club foot and looks similar to a TRS. The III SSM is a 19 spline propshaft and the IIIA SSM is a 26 spline.