quick 14boltff question

[chevyuser74]

I have a 14bolt ff out of a 73 suburban k20, with 3.73 gears, does this axle have a 30 or 31 spline pinion? I know it has 30 spline axles, reason im asking this is so i can order a installation kit for my new ring and pinion. thanks for your time.

 

[chevyuser74]

also will my new ring and pinion affect this at all?

 

[Hogback Fabrication]

Pinion is 30 spline.

All 14 bolt ratios use a 30 spline pinion gear (doesn't matter which ratio you use).