[ERASER5]

You are correct. The front reservoir on that MC goes to the front of the prop valve with 2 ports. The front 2 port design just removes the "T" joint at the cross member, other wise it works just the same.

Is that the same drum/drum prop valve? If it were me (and I did this) I would get a disc/drum prop valve from a mid 70's truck to be sure I had what I needed.

When bleeding brakes, don't slam the pedal or push real hard. It is just not necessary. I have never "popped" my prop valve while bleeding, only when a line broke, just like it is supposed to work.