Those temps are really very good at max climb out on a warm day. Temps can be pretty subjective, measuring device accuracy, location of probe etc. An air cooled engine like a jab should be around 150 at least for optimal operation(in my view) as they are designed for that. I'm happy with my 3300, CHT's at cruise are around the 150, obviously hotter in a climb. The big benefit of individual cyl probes is being able to monitor temps over time and being able to recognise a problem as it develops. IE lower temp, not making power, or running hotter maybe leaning out with valve or intake problems.