[quote=Ozlander;i   
I’ve been during a lot of reprogramming the IgniTech ignition I got from Dingy. I did some riding with a vacuum gauge noting vacuum readings at different rpms and throttle  settings. Could not get a wide range of vacuum readings. Finally, I installed a check valve in each of the 4 hoses from the vacuum ports to the MAP sensor. Finally, a full range of values from 5 to 28 in/hg.   
[ATTACH=CONFIG]103154[/ATTACH]   
Using those readings, I reprogrammed the IgnTech. 
I also dropped the needles a 1/16” in the carbs and checked float level.  
During the trip I was getting around 35 mpg pulling a trailer at 70-75 mph and 45 mpg without the trailer.   
 
Would you be willing to share those settings?