my elevation is 500 ft. when i had 320 main in it the plug burned up within 1/4 mile really white dry faul. had lots of power befor it burned up tho.i put 380 in it and plug color was good but isnt running good in the bottom and mid. im thinking that i might have a air leak somewhere . so if i spray starting fluid around all the carb boots and head will that tell me if there is a leak,or not? i have k&n pod filters.