[Leecbr]

I changed the fuel filter just in case..

Tommy,

The back fire is from the driver side exhaust. I hear it right next to me. The stumble is more of a loss of power when I give it some throttle..more like sputtering and then it hooks up some..then runs rough/labored...

The floats check out fine. The center of the distributor (internal on top) has a circular brass node that has some wear. The points under the distributor cap looks good. here are some pics..

Spark plugs next to check out. The cleaning of the wires and grounds, changing the fuel filter, cleaning the carb with some spray and new blaster coil helped it run and idle a little better. Power valve might be my thoughts. Maybe timing?

Power valve will probably have to be a shop visit..

Rick

I cleaned the air bleeds when the problems started..The car doesn't nose forward but just sputters along and stumbles..then hooks up some and if not will backfire then stummble..It runs really weak, has that feeling like it's has built up pressure or something is clogged..