Power Brake Booster

[Ernest]

When it comes time to replace it with an original style or upgraded type that works along with the master cylinder... wheres a good source to find one, brand new if possible.

Spec - 1979 malibu, SBC v8 with original disk/drum setup, zero mods.

 

[69hurstolds]

Dunno. Is it a dual diaphragm (GM p/n 18006497) or single diaprhragm booster (GM p/n 18004082)?

https://www.amazon.com/Cardone-54-71271-Remanufactured-Power-Booster/dp/B000C4599G?tag=gbody-20

Cardone has a reman for the single diaphragm as well, under p/n 54-71172. O'reilly's sells them for about 98 bucks as well. Prices are all over the map.

Try Rockauto. They have a "new" dual diaphragm for your application for about $70. NO idea on quality, however.