I am rebuilding a pair of Carter 2903's for a long ram setup on a '60 Plymouth. I picked these up some years ago and never examined them that closely. I now discovered that I am missing a secondary air valve. Does anyone have a spare they would let go, or a similar weighted valve off another carb? Thanks. (PS..the the Carbureture Shop has one, but is not selling...so it can use it as a pattern in the future). Al Wilson