1967 Dodge master cylinder part number?

[FranZ28]

Hi everyone! So me and the wife are finally getting our baby back from her sleep! First things first - last time b4 we parked her I had a "fun" roll down the hill with about 10% braking power, im now doing the brakes for good. 3 years ago I redid the hydro (boost/vac?) units and had one bad diaphragm but all is now replaced and shd be good.

The front master cyl is so so - few tiny pits inside, I am trying to find a replacement number.

So far I have found a 1967 Dodge D300 383 has 2 brake options according to Rockauto- Autozone did supply me with a number: M1643, and Oreillys NMC22202 (both correlate with Rockauto)..

Was wondering if anyone has been down this road? I am also running new lines (initially to the front) and then rear - they are rusted!

[Oz]

Contact Geoff at www.alretta.com
He's an expert on these brake systems for over 35 years.
Some master cylinders appear to fit, but don't.
Check with him.