I have the intake manifold shown below. The filtered vacuum source was removed and plugged. The plug is not the right size or has the right threads. What size do I need to fix this correctly.
1/75-1/79: 2F [4.2 liter] 2bbl intake with 5 bolt attachement to exhaust. Port behind carb for brake booster, port under carb for PCV, port in front of carb for filtered vacuum source.
1/75-1/79: 2F [4.2 liter] 2bbl intake with 5 bolt attachement to exhaust. Port behind carb for brake booster, port under carb for PCV, port in front of carb for filtered vacuum source.