If that's 1/8" NPT I probably have a tap also. I had one of those brass fittings with the screw down the middle, used to hold the oil pump for oil pan removal, it threads in pretty good, about three full turns. The repro plug's second thread in, is really flat looking, I think that's most of my trouble. I'll try cleaning it up with a small three corner file and see how it goes. According to Bratton's web site the plug for the vacuum wiper connection is the same size, I've got an old intake down under my bench (somewhere) that I think has a plug in it, I'll try that also. As far as painting goes… probably not, but maybe! It will get run first. If there aren’t any hidden nasty surprises it will go in the car, I’ll put a few miles on it and if all goes OK I’ll start looking for someone to rebuild my original engine. It would need to significantly warm up here to paint it. But hey, you never know.