I would think the best thing to do is to find out for yourself-I mean there is no "magic" area to cut out of your body to provide "optimum" cooling-IMO i would start with a small hole in line with the head of the engine and check temps from there-easy to make the hole bigger-nearly impossible to make it smaller-kinda like measure once cut twice-oh wait[&:]

I am new to nitro myself so take my thoughts how you will and good luck-the putz-