1976 Chevy Corvette misfire

EGR not likely but plugs, wires and coil all good possibilities. No miss under acceleration?

It seems to misfire or surge from 55 to 70 mph

Do you have points dist? if so check dwell 30 deg. also make sure centrifugal advance weights are free and apply vacuum in advance see if it moves and holds

I have a HEI distributor no points

Same check the weights under rotor and apply vac to advance

Check the coil, plug wires, and rotor. The rotors on gm hei ignitions system are know to fail. It arcs thru the rotor into the distributor shaft. But i bet its the plug wires.
Charlie

[quote:c499f8c3af="wcool"]Engine Performance problem
1976 Chevy Corvette V8 Two Wheel Drive Automatic 68000 miles

I have a problem with my Corvette missing at about 55 mph, just wondering could it be a bad EGR Valve or plugs and plug wires, it only has around 9,000 mile on the plugs and wires

Thanks[/quote:c499f8c3af]