273 valve adjustment???

Anybody have any good gouge or a info on 273 valve adjustments??? Seems like my 65 273 is dumping fuel right out insted of burning it..
I have no valve tap...so suspect exhaust valve is not closing and gas is not getting burnt..............also getting about 11 mpg on a 273 w/barrel carb and stock manifold and dual exhaust....Any help would be bitchin.....Anybody here in San Diego willing to help show a new guy how to do correct valve adjustment???
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