I ran 100LL AvGas for a long time in a 12:1 440 street/strip combo. Ran great and never hurt anything.
Know a local guy that ran it for YEARS in a 13:1 BB Chevy w/ 2 stages of nitrous. One of those guys that bought up leftover parts people were scared to run, but built an engine out of them that ran for years...too cheap to buy race fuel, so he always ran Avgas. Worked great for him.
This is one of those subjects that 99% of the people telling you not to run it have zero experience w/ it and are just repeating hearsay.
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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