Power King 7.50x20 highway tread are still available. About 10 years ago I was able to buy Denman Traction tires in that size but not anymore. I think the last traction tires I could find were 8.25x20. Tires, flaps and tubes are the easy part. Mounting them is another issue.

The tube connected to the air filter housing is atmosphere intake to the booster, you won't feel or notice anything there. Vacuum supply to the booster is on the intake manifold below the carb.

You'll have better luck getting a rebuild kit for the booster than buying one.

First, like noted above, get the hydraulic/manual side of the brakes in good working order. Then work on getting the booster working.

Last edited by asilverblazer; 01/20/2022 9:27 PM.