Are you familiar with VP-101 unleaded? Sez good for turbo charged and compressions up to 12.1 w/iron and 13.1 w/alum heads.............been runnin it for a couple years now.
I can get that at the pump - but I usually mix 110 leaded with my 92 octane premium. My boosted compression ratio on my iron head 360 ends up being 21.4:1 (9.5:1 + 18.8 psi of boost)
