Converting a drum/drum to disc/drum, MASTER CYLINDER QUESTION!

[Tx Firefighter]

I've always just used a master cylinder for a 71-72 truck. It's a bolt on to the firewall and pedal. You can even use a 73-87 type if you prefer. In the mid 80s they went to an aluminum body unit with clear plastic reservoirs that looks a little more trick and doesn't rust.
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[67chevemall]

Originally Posted by Tx Firefighter

I've always just used a master cylinder for a 71-72 truck. It's a bolt on to the firewall and pedal. You can even use a 73-87 type if you prefer. In the mid 80s they went to an aluminum body unit with clear plastic reservoirs that looks a little more trick and doesn't rust.
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I have a 72 on order but don't want to pick it up because they can't tell me if it will bolt up WITHOUT the booster (manual) and my brake rod.

Trying to find if there is two part numbers for a 1972 master cylinder.
One for Manual and one for Booster.

?