Gotta agree with SNS3Guppy, and I too have operated big radials....from the R4360 on the Stratocruiser, to the R2800 on the DC-6B, and even the 1649 Constellation, with it's complicated turbocompound CurtisWright engines.
Big radials need care and attention to detail in their operation, and positively do NOT like rapid/abrupt throttle movements, but otherwise are quite rugged.
In addition, some of the geared engines on GA airplanes have quite specific instructions in their operating procedures regarding rapid/abrupt throttle movement, and two types, the TCM GTSIO series as well as the Lycoming IGSO series...have service bulletins advising against advancing the propellor control to high RPM just prior to touchdown.