built up 318 oddly low MPG's? hp rating?

Ya I think if I want to do anything it'd be to keep my eyes out for cheap 318 heads but it isn't a daily driver and If I wanted fuel economy I wouldn't have bought this car to begin with haha.

I just tuned the carb myself today, front float bowl was way high and secondaries were low,
then I used a .015 feeler gauge to measure my gap on the accelerator pump,
I finally hooked up a vacuum gauge to the intake manifold and tuned the mixture, it started at around 14 and I ended up with 16 on the vacuum so we'll see if that helps.

Thanks for all your guys help