0-320. Lean out at 10k feet yesterday noticed my #4 cyl head temp under 200 while others at 300+. Rv9a vans, standard build. All rtv sealant in place. It was a cooler day, especially at altitude. Do I need to be concerned? I'd throw another probe on it but don't have one. Engine sounds fine. A bit inexperienced here and don't wanna ruin something. The engine has 550 hours on it brand-new from Lycoming. I think it most likely ran that temperature all the time now I'm just curious thanks DM