Yes I have an RCV 58. Super engine, but not as powerful as a normal 52FS. Certinly no good for prop hanging unless your plane weighs less than 3,1/2 lbs.

Fitted in a seagull Super Stearman, it flew, but marginal on power at 5,1/2 lbs. A nice sound, but now changed for a Thunder Tiger 54FS, fly's much better.

I recommend an Irvine 53 for your needs. Powerful, reliable and smooth throttle.