Anthony351W, the stuff sold as octane booster isn't all that effective. Yes, it sometimes works, but the increase you get for the money you spend is not even close to cost effective. You could consider mixing in a gallon of xylene or toulene with 10 gallons of premium and see what happens. The octane you need isn't going to be available from a small bottle. Is racing no lead available in your area ? That would be great, but it is usually scary exspensive. You could change cams or heads or pistons, but that might be more work than you want to do right now. The E85 suggestion is probably just what your truck needs. E85 has an r+m/2 of 109, and has triple the latent heat of vapourization of gasoline. It would be very happy in a 12 to 1 engine. You need to jet the carb a bit bigger and maybe change the ignition timing. I would go 25% bigger (flow area ) and then lean down from your new starting point. one range warmer plugs and a very hot thermostat would help too. Where in Ala are you ? Is this engine a daily driver ? DinosaurFan @ work, lunchin'