What mileage does your slant six powered ride get?

Make sure your vacuum advance is working properly and put in as much timing as you can without detonation. Get an a/f ratio gauge if you really want to dial in the carb. I messed with a slant in my dd for a while and got around 16 most of the time, put in a stock 73 318 and now I get 18 with the same 2bbl carb and ignition system I had on the slant.