I have not run a choke for years. I run a Holley 4150HP that has no choke, and I have not had any problems starting it throughout the year. Previously on some other cars that had manual choke on Edelbrock carbs, I did not bother to use the choke. My cars have warmed up fine and fairly quickly with my right foot choke. All of that being said, I live in Texas and winter does not get as severe as other parts of the country/world. Previously, I used q-jet '70s-style choke and other electric chokes.
I start the engine, run the engine at 1800 or so RPMs for a few seconds, slowly drop down a few hundred RPM or so intervals, and then move out when I feel that the engine is ready to smoothly take off. I have no heat to the intake manifold and just run an Edelbrock RPM with the factory engineered gap between the lifter cover and the intake.
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'70 GP Model J
462 Butler ported 87cc Edelbrock D-ports
RPM intake with Holley Sniper 2
CompCams 236/242 hydraulic roller
Tribal Tubes tri-y headers
TH400 13" Continental "Jim Hand Special"
3.50 9" CurrieTrac, 245/45-18 Front, 275/40-18 Rear
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