If all you're doing is converting to power drum brakes, all you need is
to swap in a power booster. Get one with the brackets so it can be
bolted to the firewall. You don't have to even break the brake lines
loose. Just unbolt your current master cylinder from the brake pedal and
firewall, pull it forward just enough to slip in the power booster, and
bolt it back together. You'll have to remove the master cylinder pushrod
from yours (it's just held in with a clip) and then bolt it to the power
booster, which should be already equipped with the necessary brake pedal
If you're swapping in power disc brakes, then you need to get a
disc-brake master cylinder. You'll need the disc brake spindle and
everything outboard of that. You can reuse your current I-beams. Or you
can just swap in the entire front end from a donor truck up through '79.
If the kingpins of the donor are in good shape, this is probably the
easiest route, so you won't have to mess with trying to remove the
kingpins. Since your truck is very similar to the '67-'72 vintage, at
least on the underside, you can pick up some good info at the
FORDification.com forums at
Hope this helps.
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