Will add to my own comments: You said you had the GEM gages. I'm assuming that means you have the types of measurements you mentioned, which would add TIT to what I have. And you may have readings for individual cylinders or at least a better measurement system. But so long as you know the TIT doesn't peak over what it should, and the cylinder head temps don't get over the limits, I would suspect that leaning may still be a basic and fairly good way to figure your settings. I would have thought that the GEM installation would include some settings info, but??
BTW, when I am in a "climb" configuration I generally follow the POH settings: 2600 RPM / 28" MAP, 14.5 GPH. I have found that one GPH meter reads a little different than the other, so I make sure the EGT meters read reasonbly similar, using the lowest one as a "yardstick" of sorts.
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