[ElkyKid34]

I need to replace my master cylinder and my brake booster in an 82 El Camino with a 3.8 V6. How do i tell if it is a single or dual diagram? any answer would be great!

 

[goodcruiser]

Take a look at these and you can see for yourself.
http://www.oreillyauto.com/site/c/search/Power+Brake+Booster/01305/C0066.oap?model=El+Camino&vi=1042625&year=1982&make=Chevrolet

 

[ccc]

most elcos i have seen have the dual one

 

[ElkyKid34]

Okay thanks I will see what i can do

 

[Daddymav]

The dual diaphram booster is a bolt on upgrade from the single and there is typically not much difference in price. Regardless of which one you have, I'd replace it with the dual.