When I had the opportunity to check out both Doc and Monza's cars last spring, they both had 4 kits on them. They both seem fairly sharp but I think Monza has his act together a little more. For some reason Doc & his car are too unpredictable. As for Dave, yeah the back end is down low and the front is up keeping the power/ weight applied. On spray you could always watch the little sparks shooting from the header flames and that only means one thing..it's hurting parts.
We always try to be just a little bit conservative with our tune. Crazy thing is years ago a good rule of thumb was 4-6 jet spread..now there are guys running a 20 jet spread. Some with several kits are also injecting water to help keep the cyl's cool enough.
People always advance.
When I had the supercharged Harley with Nitrous I originally Had the jets in the intake clocked right at the valve. It was violent. Very violent.
I turned them 180 and the violence was less but the power was still there.
I switched up to a plate style under carb unit and it settled the engine down as an intercooler would and the power was more manageable and I could add more if desired.
The carb was in front of the blower so I believe iy was cooling the charge.