"...Your friend hurting parts at 15% had serious tuning issues which is not the norm with that low of a percentage..."
Hi Bill, with due respect, that was my thinking too. Compared to the exotic Jr Fuel motors, I think (speculate) that
tipping the can at 30% would be cheaper on the long run.
I'm very excited with your pursuit for the 7.0s, good luck and keep us posted. From the little I know you, I know you can do it. Although so far I'm pretty much a bench racer, I fully sympathize with your perspective:
"... To me half the fun of racing is trying to come up with ways to make my car faster ! ..."