BTW,
All of the Rhiems built Cessnas have an FAA TCDS. (FRA150s are the French built Aerobats with the O-240) So.... if a person found an O-240, they could put it in an Aerobat with very little legal difficulty. The TCDS calls for a different propeller. But it’s all there in the TCDS. :-) That is Why I believe putting an IO-240 is quite possible. Bill Rourke mentioned, if I remember correctly, an FAA DER could get it approved for the right amount of money. Now, all someone needs to do is throw a lot of time and money into it. ;-)
Yeah, I know... we don’t need another -240 thread. Sorry for going off topic.