My bro has a 99 shee with a pro-design cool head with 17cc domes, all stock crank, pro-x pistons, bored 40 over, comp is 210 in each, fmf fatty's, and a freakin boost bottle, k&n w/out lid. how long do you think his crank and piston will hold up to that compression? He has gas mixed from back in mid may it was 111 leaded mixed with 91 unleaded and 32:1 927 castor, do you think it is still safe to run the gas through his shee or just get new fuel? thanks for all your help, need as much info as possible please, thanks alot.
matt