just start it up and let it idle..
then spray some carb cleaner around the areas you suspect may have a leak...like intake gasket area.
carb base ect...
if the idle changes drastically you have found the source of the vacuum leak

365" Iron J heads,,3480lbs best 1.39 60ft on SS springs.10.54,124 mph ...6.67 1/8th et.average 60fts 1.46 w/ small cam &.063 no2 pill tagged & insured
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