Do/check the easy stuff first.
That's why I suggested some of the things I did.
I would hate to see you tear down the engine, if it is something on the outside.
Only One vacuum port? Is there not one on the back side of the intake, and one on the carb or does it have a plug in it? Should have a 3/8" port for the pcv/booster hook up. is it capped off?
Does the vacuum reading increase when you slowly open the throttle?
Was the vacuum low before the intake change?
What intake did you put on?
What carburetor?
Double check the plugs and make sure they are tight and one isn't loose making the ticking sound.
