I have a 1986 Gn that I have been using 112 octane race fuel in. I have an SMC alcohol system installed but I was just using race gas. My SMC system is still installed and operational. Back when I was using it I would use denatured alcohol from Lowe's in the system. I am still going to use race gas at the track but I am considering using 93 octane and the alcohol on the street. Is denatured alcohol still the stuff to use or is there something better out there? I need something easy to get. My GN has a 160 thermostat, TA 49 turbo, Blue Top injectors from a Thunderbird, 3 inch downpipe, no cat, 2 1/2 inch exhaust from cat delete pipe back, adjustable fuel pressure regulator, Walbro 307 hot wired fuel pump, Hr driver's side motor mount, boost commander controller so I can set boost at a twist of a knob from the cabin, and a Jim Testa chip. I use turbo link as my scan tool. Bruce