I dont mind running 91 octane, because I already run 93 in it. I already have the double humps, so I will probably run them for right now. And the cams you guys listed don't come with lifters, so what types of lifters will I need when doing the cam swap. is it safe to reuse the ones that i already have? My existing cam and lifters have less than 30 miles on them. How much hp do you think those would bring me up to?