What to do first?

1973 plymouth valiant. 225 Slant 6(aka slant 6 forum), with an auto trans. And by computer I am talking about the HEI upgrade(computer was the only word that came to mind when I was exhausted). Just because others have been ignorant about certain things does not mean others are as well. I am new to carburetors but not cars and not forums. As far as I know, all A-body, slant six engines had adjustable valves(that need to be adjusted from time to time from lobes and/or rocker arms wearing). And over time or from previous owners, everything needs to be checked. I ran a can of BGK cleaner through the tank and after I have a high idle and rich condition(gas smell and actual gas caught on a paper towel). No misses, full spark on all cylinders, Runs and shifts fine so I need to stop washing the off the cylinder walls with my gas and wasting my fuel mileage. Now I can fix almost everything in or about my car with the exception of welding and setting up gears in differentials. Thank you to the first few responses that actually read the question and answered it. I never asked for anyone to diagnose a problem, simply educate me on the proper order of what I need to adjust and check first. Sorry If I come off as snoody or rude but It was a simple question.