M1 or Port-Matched LD4B on 408

My 367 requires no choke at all at 50-90 Ambient. My 750DP has never had a choke on it, I bought it from a friend in 78 without one.
Yeah the low-speed is a little fat, that's what it takes to idle down to 550 warmed up at 5 to 7 degrees advance, so I can drive it at 4 mph, with a 230 cam in first gear.
At 50*ambient, and 14* idle-timing, it will take a few blips to load the AirGap up, and then I can back out of the carport,and drive away. The aluminum heads take about 3 miles to warm up, or maybe it's the AG, whatever, and then I can see the SpeedO pick up a few mphs.