The brake booster is bad on my 77ish, so I tried NAPA, O'Reillys, Rock Auto, Advanced, and none of them seem to be able to get the booster for dual piston brakes.
Any ideas what else would work? What about something from a hot rod shop?
Which booster are you looking for? Is it the small diameter? I understood that the big diameters were still available. Kinda concerning if they aren't....
Wild guess, I looked it up for a 79, only way I could get dual piston calipers. When I buy at auto zone or oriellys I usually have to look it up and call with a part number.