I had switched the gasket with another aftermarket reman I have on the shelf. same result a few days later.
no signs of rust or pits on the top edge of the casting. But I have no real way to ck if its flat. Lid lays flat on the table with no gasket in it .

Im going to switch lids next and see what that nets me,


Im kind of thinking I may switch to disc brakes somewhere down the road ,,,,but wasnt planning to do that for another couple years , If at all.

I saw these all new drum brake master cylinders and wondered about quality for the price