I fly new Pipers and have experience with a myriad of TC'd aircraft and I like to run them all 100 degree's rich of peak. You will keep CHT's below 400-F and total FF increase is maybe 2gph max for a happy engine. Most planes, especially the older ones do not have the precise or even calibrated EGT/CHT probes. So a slight conservative approach is always safer in my opinion.

Also, I like to "Step-down" my power as I'm arriving. Plan on reducing 1" MAP per minute. So at a 30" MAP, appx 12 minutes away you need to start reducing unless you already have for the descent in turbulent weather. This gives you appx 10 minutes to slowly cool down the engine and have around 20" which works for most planes in the pattern, and also means you'll be at that power setting and slowed down 2 minutes prior to the airport.

Also as mentioned above, after landing, allow the engine/turbo's to cool by using low power settings. Try to maintain 1000RPM or less, and use your momentum and minimal braking to cruise to the ramp. Watch the CHT/TIT and once they stabilize(usually 2-4 minutes from the time you land), you can shut down.

Should be a fun experience, hope all goes well.