axles???

[impalaboy9]

Alright guys I'm rebuilding a 65 stepside swb. As far as I know they are 12 bolt rear ends and mine appears to be that. I have an open carrier and I wanted posi since the winters in Nebraska can get nasty. 4x4 planned for later. Anyway I ordered the richmond Lockright system since money is sort of an issue. Jegs only had one listing for a 65 and it didn't offer an axle spline count so I assumed there was only one spline option (should have known better) I pulled my axles and they are 17 spline and the richmond setup is for 28 or 30(just guessing havent counted yet) Is my truck a freak or am I going to have to order new axles? Thanks for any help. I would also like to hear from anyone who has used this setup. Thanks.