68 383 with 750 carb. Runs rich

Just a little update Business trip then vacation now manifold is off due to a major oil leak that sprung up thread in Big Block A body tech "383 intake gasket and valve cover choice". Getting new valve covers, PCV installed and a new intake gasket. I wonder if part of my issue getting this thing to run right was oil getting into the intake/exhaust ports and a vacuum leak, time will tell.