OK another question. I somehow broke a nipple off the vacuum port that screws into the manifold . Not a big deal as i don’t need it. but i need a plug to screw in there and I don’t want to damage the threads. I saw some british thread plugs that might work. But i figured i would try here first. Maybe someone has a link for an easy way to source one. See pic for area that needs plug. I think its equivalent to 1/8” BSP BSPT plug .