Australia has its share of Chippie mods.
Sasin Aerostructures SA-29 Spraymaster: Photo Geoff Goodall
SA29 Spraymaster. The original engine was swapped out for a 210 hp Continental, although a Mk 2 version was offered with a conventional 145 hp Gipsy Major 10. The aircraft above was the Sundowner (non agricultural) variant featuring a 180 hp Lycoming O-360 engine: Photo Ed Coates