I'm leaning to a spark problem. With A fuel problem it would fall on it's face & pick back up when you let up on the throttle. Make sure the HEI is not powered through the original resister. Check the spark plugs. Testing & idle ing can build up a varnish on the insulators with the gas we get now. That is quite possible with the cold plugs you are using.


George


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.
1972 Chevy c10 Cheyenne Super
In the Gallery Forum