Carburetor-specific tips?

[jcp123]

Many of you may know by now that I'm selling my Focus and am driving a '67 Mustang Convertible as my daily driver. Last tank came in at 13.71mpg, better than I'd have expected given its past performance.

Car has a 302 bored .030" over (306ci total), C4 3-speed automatic w/o overdrive, and a 3:1 ratio rear end. The drivetrain was recently rebuilt and is past its official break-in period but probably has another 10k miles or so of loosening up to do. Car weighs approx. ~2800 lbs, give or take 150lbs. I've also noticed courtesy the '68 Hardtop I drove in high school that the cars are more or less indifferent to how they're driven. In 3 years, at 100-115 miles per week, my weekly Friday fillup never varied more than a half gallon either way, and I'd guess my standard deviation at around .4 gallons. I venture to guess that this is because they have gobs of torque for their weight and already shift at exceptionally low rpm's?

So, what things apply specifically to carb'd vehicles which I can apply?