I have somewhat the same problem on my '66 coupe. The electric choke setting and the idle mixture on my 306 /Performer/Road Demon has to be just right for the engine to transition from cold to operating temp (180). even at optimum settings, I still have to baby it along until it's warmed up. Then, watch out.
Rev
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'66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi.
O.B.C. #2
'66 coupe
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