On the victor jr. manifold there are three threaded holes on the front of the intake. One is plugged, one has my water temp sensor in it and the other is stripped to s#$t on the first couple threads (the one in the middle). I think i can clean it up with the right tap but dont know what that is. I think it may be a 1/2" NPT but am not sure. Does anyone happen to know?

from what i remember its 1/2" npt also..