Brent-meant to have responded last week. These old girls are reasonably approachable for most A&P’s with some experience in 1960’s birds like Comanches or Debonairs. My A&P did a FWF engine for me in 2017 and replaced all the hoses as well. Some gray hair is needed though IMO. If all they have been wrenching have been 172’s or Warriors, might be a bit much.