Quote: Iron heads,iron block best pass @ 10lbs was 9.907 @140 mph at 35*.
That sure sounds like a lot of timing on 10# specially with iron heads
If the carbs were too fat,increasing the timing would clean the plugs up to a certain extent.Went from 32*,to 35* and then 37*.to get the plugs you see at the top of the thread. 37* the e/t & MPH fell off but the plug looked the best. I will try a set of 7's and go from there
Sounds like you better start working on the cruise A/F ratio then pull some timing
