Any difference in steering coupler power/manual in '64?

[Montclaire]

Hello, is there any difference between power and manual steering couplers in 64? Thanks

 

[Moparparts]

power and manual couplers have a different box spline diameter and will not interchange all the way up through 74 at least and probably beyond

 

[Montclaire]

Ah. I have a newer style manual box which will make this even harder to figure out. I wonder if a 64 manual coupler will fit a 72 style manual box....

 

[2059]

64 P/S gear box shaft dia. is 1/2". M/S is 9/16". also, the steering column shaft for the P/S units are ~3" shorter than the manual if it matters to ya.