Now. To insure I had the right length intermediate push rod, the one that go's between the booster and the master I had intended to purchase this assembly from Oreillies.
A complete matched set, part number 50-3715, Al Cardone, 1967 C10 Truck.
But its no longer available fully assembled. It is now an R&R part. Which means? You remove your complete assembly, send it in and they rebuild and send it back to you.