Ran 100LL in a 12.5:1 440 for a few years and never had any problems. Ran just as good on VP 110. Local guy ran it for years in a 14:1 BB Chevy while spraying 2 stages of nitrous. I wouldn't necessarily recommend that, but it worked for him.
Always amazes me at the comments made about running this stuff in cars.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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