I have never used a s/x regulator but most of them are 1/8" pipe thread that's the size that goes in the regulator and the side that your vacuum hose goes on is 1/8" barbed
If you want to order you can got to summit racing or jegs but if your in a rush home depot has these in the plumbing section but its brass
It's not 1/8 pipe. It is really really small. Went to HD and they didn't have anything even close. Brought it over my friends house who owns a hot rod shop and he had never seen anything that small. Decided to just re-tap the hole and put a bigger nipple in it. Problem solved.
It was loose, and was always coming loose on me. Apparently I go to the gym to much, tightened it up, took a little snug on it and snap. Good work Clint.
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