Brake Conversion Question 63 c15

[Ace2717]

Hey everyone. I've just kind of inherited a partial restoration. And I've got a brake question. The truck has been half converted to disc brakes ( last owner bought a 4 wheel conversion, but since the back axle is a 3/4 ton, the kit didn't fit.) So the rear brakes were just rebuilt at drums. I know that in 71 the trucks started having a disc drum system available from the factory, so i was curious if I could just buy a 71 or later master cylinder and hook everything up. Anyone know if that would just bolt on? Thanks.
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