I try to do the race gas/street gas mixture, but on long trips to the nationals, I have used the NOS stuff with positive results. I am on the cusp of being able to get away with 93 Octane, so it seems to work. Of course, I usually have a few gallons of the race/street mix, so I haven't soley relied on it. But is has come through in a pinch.
68 Road Runner (383/4speed, post car w/decor pkg) - Major Project 69 Road Runner w/472 Hemi & 4 speed. 70 Challenger R/T SE EF8 w/ V9J, U - A32 - Major Project 2023 Ford Mach 1