If this had been available before I overhauled, I would have seriously considered it. FWF 150hp conversion, with paperwork apparently.

https://www.barnstormers.com/classified_1456152_CESSNA+150HP+FIRE+WALL+FOWARD.html

Whoever is interested in this needs to be sure the STC holder will do a transfer to a different airframe. There's a few conversions out there where the STC holder is no longer in business or supporting the STC. That's not an issue as the FAA has provisions to use the data from abandoned STC but it takes several months to do that.

Well that’s a bit of a monkey wrench...