Not Ranked
I have a 427W and Megasquirt 2 and get between 19 on the highway putting at 2500 RPM in 6th to 6 or so keeping the R's high and driving full open or hard brakes
I also have MS2 on a 383 in a 71 vette with a cheap chinese 8 stack, and it's surprisingly well mannered. I'm running it in a hybrid alpha N/speed density mode that works very well. Under light loads where there is a vacuum signal it's speed density but when you open it up, it goes to alpha N and pours the fuel.
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