I'd check the fuel lines, fuel filter are clean also tank, my 53 ran but line from tank was almost totally clogged. Had a bad flooding problem with my Rochester, had to add an adjustable regulator to fuel line, getting pressure down to about 2-3 lbs did the trick.
Best of luck
Last edited by JiMerit Boltr#43; 11/01/2017 3:45 PM.