Questions about my 1967 project??

[oldsmobilekindofguy]

I was wondering what type of transmissions they put in the 1967 c-10's with a 283, it has the three on the tree.

Does anyone know how hard it would be to put a 5.7 vortec into the 67 c-10 and if a TH350 tranny would bolt up to the 5.7 vortec??

Also the 67 has powersteering and I was wondering if all 1967 c-10's had powersteering or if mine is rare??

Thanks for all your help