I have a IV Classic with a 582 gray head, B gear box 2.58:1, Warp 2 blade 70” w/ tapered tips pitched at 10.7 degrees. Static is 5950 RPM short of 6200 RPM. Talking with a few local friends, they seem to think that the engine isn’t producing the HP that it should. History of the engine it had a previous prop strike, rebuilt 7 years ago by a guy in FL who didn’t replace the crank. I assumed he inspected the crank? It then sat in a conditioned room for 5 years. After a few run ups, checked the plugs and it appears that it’s burning rich. Running cool. EGTs 950-1000. Rebuilt carbs replacing all jets and needles with the factory recommended jetting. Did some run ups with no change in RPM. Started stepping down in the main jet size followed by run ups. No change. Did the main jet sep down 4 times with no RPM increase. EGTs did rise to 1100. Did a compression check and it’s OK. Does anyone with this set up run the prop any flatter? Trying to decide what to do next.