So what to do?
As discussed with Captainfab, the manual drum drum 1" bore deep well piston master cylinder is the same as that used on the power drum drum master assembly above.....hmmmm, I already have the master......
Yes, the booster with proper long intermediate pushrod is still available from Oreillies/Al Cardone. Part number 54-73709. So, we bought it. I had to eat the core since I didn't have a booster to trade in but.......you go with whatcha got.
Here is the booster we used.
