does anyone know what the thread size is for hte oil pressure sensor on the back of a b series block, is it 1/4 or 3/8 " its not metric right?? just looking to bid on a t fitting that says its 1/4". im gonna use common sense and geuss the thread is a really fine pitch too right?? also anybody ever use those golden eagle vacuum manifolds with the 6 ports on them?? it sounds to be helpful but didnt know if anybody could give any feedback on how well they operate or if they are accurate to mani. vacuum.