Percolation? Heat soak? Don't drive during summer??

yes on , todays fuel wows with carbs , i had to block off that heat transfor ports between the heads , and isolate the carb from the rising heat to the carb , by a stack of gasket then heat plate alum one and repeat this a few times to keep it from boiling the fuel in the bowls . my cam has enough overlap it cooks the paint off the primery tubes . DSC09262.JPG DSC09263.JPG