a word of advice if i were you,i would put a nylon tie on your muffler my irvine 53 had problems with the screw coming loose a few other fellas at the field had them come apart and fall off we never found the pieces.the cylinders head is exposed to the air i doubt you will have overheating problems,one of mine is in a Giles 202 with a cutout for the head in the cowl.never hurts to check though,good flying.