Well you guys can call me a liar again. Labor day I drove my truck to a car show. Highway/city 13.18mpg, the LM-1 showed 14.2-1 A/F ratio most of the time. I could lean it out more but like to make sure it's safe.
528 Hemi, compression is 10.6-1, Weiand tunnel ram with 2 850+cfm Thermoquads, MP cam 272/274@.050, TA 10" converter, 4.56 gears, 31" tall tires. Timing 30 degrees at idle, 35 degrees@ 2000rpm Cruises at 3400rpm.
It's really hard to stay out of the throttle too. Dave