same setup i have listed in my sig but with a 150 shot. . . . should i be worried about cracking a block? im running 114 octane so detonation should not be too big of an issue. I have the timing set at 12 degrees initial, window switch and 2 step colder plugs. . . i guess all i can do is pray and hold on because im sure it will be one hell of a ride! w