Is it possible??

I have a 67' RIV I am along way from doing anything on it. I was wondeing if there is a compatable GM to swap from 4 wheel drum to disc? At least on the front. I know I will have to change everything from the spindle out, but will I need to change out the master cylendar? It has a dual resivior. I have seen after market swap kits but they are out of my budget. Trying to find something that I might be able to get from a wrecking yard or something.

Cheap way is to look at when Buick first offered ft discs on the full size buicks, 68 or 69. Then you would need a donor car for all the parts, a new disc master is also required.