I had tried with both a modified Spark Adv and the stock one for the record.
I have some KR approaching the 4000 RPM range in the .60-up gm/cyl area. With both.
I noticed this during a KR and Spark log I typically run....and when I was getting on the interstate. So I was in like 3rd gear pull. Did also from a stop running up thru the gears.
Anyone else have this with their 4.3 ?
Spark Tables in the mid 20* range and it pulls down to high teens in KR. Pulling like close to 7* and below in this area.