Hi,

Forget the 14cc, it's a dog. Been there done that. No power for the weight. If the 23.6cc is an older model, it's a great engine. Would be a very good engine even if it's not an older model. Can't tell you about parts as I make my own. For mounting I just install four studs with nuts to hold the backplate on. These studs then go through the firewall and get nuts/washers behind. If the engine needs rings, look up Frank Bowman in New Mexico. If you can't make a prop adapter, try Whacker engines. I highly recommend going to electronic ignition such as the CH units. Saves weight, easier starting, and more power as you can optimize the timing.

AV8TOR