factory 1 1/2" brakes for 73-87 c10s?

[Mtrhd329]

I've read a few threads regarding some people upgrading brakes to 1 1/2". From what I gather this is able to be put on the c10 spindles. I have a 1979 c10 with 1.25" rotors and want to make sure this is possible before I order parts. As long as I gdt the right inner and outer bearings it shiuld fit right? What brake code and what vehicle was this 1 1/2" available on? In other words how do I find parts for this through the local parts house. Thanks for the help.
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