[GB SISSON]

A week ago I thought I had it all figured out. But when I finally got a chance to test drive it, all was still the same. I put the old ugly carb back on it. Still the same. Today with the help of my son we swapped the other distributor back in like Mart (smart) said. Voila! Steady acceleration, pulls really well, runs smooth on the flat and the idle is smooth as silk. So the big problem was the cap. When I pulled old woodie into the garage I heard a loud hissing sound and I remembered why I swapped out that distributor a year ago. The gasket was perfect and so was the little donut. I also greased the gasket this morning on installation. I pulled the vacuum tube from the intake and now of course I had a vacuum leak, but it still ran ok sort of. Then I capped off the tube at the intake and ran (idled) really smooth with no sucking sound up front. I remember running that dis that way for quite a few months with no issues. So now I'm heading out for a test drive with no vacuum to the distributor. I'm thinking it will still perform well. Question of the night.... What harm would/could be done running with the vac plugged off? Thanks. GB