Thanks for the replies.

So outer sleeve mounting holes is only difference on 3 and 4 speed transmissions
56 to 57 difference is length due to steering wheel differences.

Seems to be the same for GMC and Chevy

Thank you gentlemen.

"Do not walk behind me, for I may not lead. Do not walk ahead of me, for I may not follow. Do not walk beside me either. Just leave me alone, you're starting to freak me out."

1957 GMC 150