[aggie91]

Thanks, another good write up for you. I did a bit of checking on costs for the parts on RockAuto.com.

They still have the booster/master combo available from A1 Cardone for the part number you have listed:
A-1 CARDONE Part # 503715 Reman. A-1 CARDONE Vacuum Power Brake Booster w/Master Cylinder

Price:$117.79 + Core:$31.50 = Total: $149.29

Just the booster is:
A-1 CARDONE Part # 5473709 Reman. A-1 CARDONE Vacuum Power Brake Booster w/o Master Cylinder

Price:$63.79 + Core:$20.00 = Total: $83.79

Master Cylinder is:
BENDIX Part # 11329 New Master Cylinder
Front drum brake 11" x 2 3/4"; Front drum brake 11" x 2"

Price:$36.99 + Core:$0.00 = Total: $36.99

or:
A-1 CARDONE Part # 101329 Reman. w/ Reservoir

Price:$19.56 + Core:$20.00 = Total: $39.56

Based on this, you could save a bit of cash buying the booster and master separately: $83.79 + $39.56 = $123.35 for the A1 Cardone parts...

Again Great write up and discussion of what you did once the parts are installed to get the most out of the setup.