Master cylinder swap

[troymn]

I have a 66 f100 that I'm installing disk brakes on. Will a master off a 68 f250 with factory disk work if I would use 74 calipers? Thanks!

[STYLN63]

2 wheel disc or 4 wheel? if 2 wheel, that should be fine. If 4 wheel, you will need to consider a 1 1/8" bore unit with similar size reservoir chambers (disc/drum set ups have one small and one large chamber). You could use a 4 wheel disc corvette style or go the Wilwood route if changing to 4 wheel disc. Just remember, when you plumb a 2 Disc/2 Drum set up, use a 10lb residual valve in the line going back to the drums; the valve will keep pressure against the drums to make them have a similar response time as the disc when pressurized.

[troymn]

Thanks STYLN63! It is 2 wheel and I also have a proportioning valve for it also.

[troymn]

With that being said.... Will the brackets for the power steering and alt work from a 351vwork on a later 302( 4 bolt bottom pulley)? I know I need the bottom pulley also. Thanks again!

[Toyz]

It depends on the 302. If it a serpentine belt setup; not without some modification. The water pump rotation is reversed on the serpentines. Some of the earlier applications will directly interchange with the 351.
Paul

[troymn]

Thanks Toyz! It has been changed to the old v belt and the water pumped swapped. It is great having all the knowledge you guys have in one place!