309 Master Cylinder Identification

[COPO]

Looking through some parts in the basement and found a nice rebuilt #309 master cylinder. I know the 309 was correct for hipo 69 Camaro, but this one is stamped "BA" instead of "US" What is the difference? Any fit issues?

[camarojoe]

The 309 was simply the master cylinder used when front power disc brakes were ordered... nothing really "hipo" about it. BA is the stamp for Chevelle, US is for Camaro...other than the stamp, they should be identical.

[COPO]

thanks joe. Curious why Chevelle MC and Camaro MC are coded different is the part is identical?