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Thanks for your reply, Leecbr. I had a chat with Wilwood and the tech guy said the proportioning valve I was using was sufficient, as was the bore size of the new master cylinder. He suggested I bench bleed the master cylinder again, which I did, no improvement. On a follow-up call to Wilwood, the tech guy thought it was still air in the line and that I should do a hand bleed to get full throw of the master cylinder piston while in the car thru the brake line system. Sounds rather difficult given the size of the foot box.
He did say that some people have needed to shim the GM Metric calipers with a brake pad shim to get proper operation. Has anyone needed to do this that has these types of calipers?
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