[Oak]

Hi all.

I´m about to order some parts from PY and I need a new proportion valve.
The car is a 72 GTO with stock disc/drum brakes.

Can you help me choose the right one, I´m a little bit confused here?

In the GTO catalog there are only these two to choose from
RPE239A 1968-69 PROPORTION VALVE- Front Disc................$59.00/ea
RPE239B 1968-69 PROPORTION VALVE- Disc & Drum..........$109.00/ea

But in the Firebird catalog there are these two:
RPE239M 1971-77 PROPORTION VALVE, w/ Frt Disc & Rr Drum..$65.00
RPE239N 1971-77 PROPORTION VALVE, w/ frt & Rr Drum...........$75.00

So which one should I buy?

Thanks.

Regards

Johan , Sweden