Was helping my son with his Trans am. Slowly heats up. Pulled a plug, its terribly lean. Plugs are white. He ripped the quadrajet apart, #70 jets and the donor carb i have has #77’s. Not sure what needles will work in the bigger jets, we are working on getting it to richen up. 455 olds.
Until today, he was not willing to touch a carb, now hes tearing into it like a fat guy with a big mac.
At first we adjusted idle, got a but better, then timing, so now it pulls better, so im thinking we are gettibg closer.