Norfolk would be a good place, but I'm southern Germany at the moment... lol. A long flight for that. I can get to FL100 as it is all Class E to that level here, except for around the big airports where it is C/D. So I can probably get a good idea of climb performance to that level. I think it is C above that, so could probably ask Lagen Info for higher, they might say bog off... but you never know.
The steed does have 1 EGT gauge, in fact all aircraft I can get my hands on do, I'm not sure but the C182 might have EGT/CHT per cylinder as well; I would need to check.
I normally cruise around 6k to 8k when the leg is longer than an hour. Did Strasbourg a while ago 61 minutes wheels up to wheels down FL065. Worked well to constant EGT up to cruise and then set cruise power Peak EGT. On the way down I nudged it to about 100F ROP and then let it come back to just ROP, before nudging to 100F again. Worked well with a power on decent. Out of a PA28 got 125 to 130 KIAS all the way down to the circuit.