[firechickenman]

Its been 10.78-10.84 all week until today. Ran 10.94 @ 123. Waiting in lanes for another pass. No changes since the converter, intake, carb and cam earlier this year. It will definitely get a new converter before next year!

[R639]

Sorry to jump into this thread late but I want to clarify what pinion angle is. Pinion angle is the relationship between the pinion and the transmission output shaft not the driveline. The driveline angle is a separate issue and is determined by the height difference between the pinion and the trans output shaft. The goal is that the pinion and output shaft be parallel (i.e. pinion angle of 0 deg.) under full load but to achieve that the pinion needs to be down a little because of the "give" in the rear suspension links...about 1or2 deg. with a 4-link or ladder bar and about twice that for a leaf spring/cal-trac. I started doing back-halves & 4-links in the 70s and can't tell you over the years how many racers believe that pinion angle effects traction. They think that because they adjusted the 4-link or ladder bars or the leaf spring bars which do effect traction and saw the pinion angle change, therefore pinion angle must change traction. Pinion angle needs to be checked and adjusted after the bars are adjusted. Pinion angle needs to be measured with rear end at ride height. Ideal drive line angle is 0 deg. also but usually isn't achieved unless your building a complete chassis car, and suspension travel changes the drive line angle anyway. BTW.. how to adjust leaf-spring pinion angle...angled wedge between spring & perch or re-weld perch if it's off a lot.
Sounds like you're trying the right things to "dial in" your car. It takes time but one change at a time is usually the shortest route to the goal.