Is it running rich at idle, under load, WOT, all the time? Is the choke butterfly working ok?
Is the jetting and idle mixture set properly for the engine?
You can have an O2 sensor installed and know for sure what your AFR is and go from there.
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1965 Pontiac GTO
455/469 w/ #48 Heads, '65 Tri-Power
9.25:1 CR
Stump Puller Cam
Muncie M22W 1st-2.56 2nd-1.75 3rd-1.37 4th-1.00
3.55 Rear Differential
Front: 225/60R15 Height: 25.6"
Rear: 275/60R15 Height: 28"
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