Re: Plug for 71-72 combination/proportioning valve
It's a bleeder screw. There is no seat for a flared brake line in that hole. Not sure what a '71-'72 combo valve looks like at this point. I ended up removing mine and putting a Wilwood valve in for the rear brakes on my truck.
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~Steven
'70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper
Simi Valley, CA
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