[AcampoDave]

I've had more time to mess with things and I tried leaning the primarys out by another 4 percent. (I was already at 8 percent from its out of the box setting) but that was clearly too much. The truck ran poorly and AFR values were bouncing around up toward 17plus just cruising gently. I pulled my choke, it ran good again back in the 14s, so I dropped back to my previous setting and focused on the WOT where I was actually getting high 10's on the AFR guage with the out of the box secondary jetting. I leaned that by 4 percent today and was rewarded with a faster engine that was responding well to having an AFR bouncing around in the mid 11's with an occasional burst into low 12's. Sometime soon I hope to drive it into the mountains where I can climb steep grades and spend greater amounts of time with my foot to the floor. That should provide a better picture of where I really am. Blasting down country roads is really becoming a bit too much for my comfort (even with a 283). I'll let you know how it goes when I get to it again.