Shaggy Sheep Driver and all you sentimental pillocks who think the Gypsy oil splasher is the ONLY correct engine for that precious Chipmunk, may as well put the remaining Chipmunks into museum storage for preservation....hold on a minute!
I had a look at GINFO -- OK, I didn't read every single entry, as there are ONE HUNDRED AND TWENTY ONE CHIPMUNKS listed! not all that scarce, then.
And of these 121 Chipmunks listed, 12 have installed Lycoming engines!
Res ipse loquator. The Chipmunk lives, while it is doing a proper job. Even in the Portugese Airforce, friends!
If you want to preserve your precious assets in aspic, you condemn them to be unloved, unused, and to rust. Some people think pulling up gliders is not worth considering. Well, it kept my Supercub in employment (and me) enough to keep on flying for 25 years.
Consider, friends, when praising the Piper Cub, how many wonderful variations on a theme keep that immortal design aloft.