AV gas is the best, most consistent, federally regulated fuel available.
Next are brands like VP which is available in select gas stations and speed shops here in AZ.
I have run REGULAR 87 octane with varying percentages of AV gas into the SEVENS at over 170 MPH! I've been doing it for over 40 years now. A bit inconvenient, sure, but it works for me. 100 LL (low lead) mixed with regular will reduce O2 sensor life, but those are cheaper than pistons, rings, and headgaskets. And easier to change!
The FEDS are trying to make all AV gas unleaded soon anyway, so that won't be an issue any longer.
Some of the locals run 87 regular with the Alky Controls kit. So far reports have been successful in the low20s lb. Boost range. They just start the alky at a bit lower boost level than normal.
This is an informational post as to what locals are doing, and when my car is dialed and reliable, I'll post my results. As I do have a hi perf machine shop, I get more feedback than most folks, and I do get to see the results of when somebody's brilliant idea didn't work!