So basically I need to run it on a dyno? That or buy an a/f meter. I haven't got on it due to it just being broke in, but it takes no effort to get her rolling. I may even manage better mileage with some pep and compression. The lope is now noticeable and I'm liking it. Thanks for all your help.
1966 F100 LWB
Balanced 390 .060 over, Comp 270s, gasket matched F427 intake, headers, gasket matched/bowl blended C8AE-H heads, 2-1/2" duals, C-O-M with 3:54 gears and Tracloc.