power disc brake booster
 

as the 8515 power disc brake booster a 67 Camaro only piece or was that number used on other GM cars?

Used on 1967 Camaros,and 1968 Camaros up until mid Nov. 67 I believe.

So, what replaced the 8515 and was before 9204?Joe

Here you go: http://www.camaros.org/suspen.shtml#Brakecomp

The 8515 power disc brake booster was primarily used on the 1967 Camaro, but similar parts were often used across other GM models from that era. Best to double-check part numbers for other applications.

67-69 Nova generally used the same boosters as 67-69 Camaro.