This is very simple with all our Lycoming engines. Carby or injected. If it is a small climb, say 500-1000' do nothing just climb at about 120KIAS.
If it is a climb from 1500 up to 9500, it's full rich, full RPM and WOT. Then a big mixture pull at TOC.
Lean Find Functions are a great concept teaching tool, but not a great operational tool. If you set say 25dF LOP with the lean find you will most certainly end up at 40-50df LOP if you go back and find peak from the lean side using raw data on the previously last to peak cylinder.
You can run LOP happily well above 75% power....no problem.
80% and above 60-80dF LOP
75% about 40dF LOP
70% about 25dF LOP
65% or less 10-15dF LOP
IMPORTANT NOTE: Do not use Lean Find functions as a normal operational tool. Great educational tool, but they all wind you up further LOP than you think.
Work out your richest cylinder and use it as your reference.
Next trap most people fall into. If you are 80% power when ROP, and you lean to an appropriate LOP power, that should be a 10% BMEP drop, like the big old radial days. That means you will end up at 72% power, which serendipitously is going to be around 25-30dF LOP.
If you are at 72% power and ROP, you will end up 65% power when LOP, and that will be around 10-15dF LOP.
The simple answer is read all John Deakins articles carefully, they are sticked somewhere here on VAF.