I asked a question on E Bay to the seller if any of his modles were able to be converted to R/C by a modeller, this ia his answer.
"Item: 35" Riva Aquarama Carlo Speed Boat Italy Model Ship (200004599868)
This message was sent while the listing was active.
modelshiponline is the seller.
Yes. Definitely. I have personally removed the rear deck canopy before and there are sufficient place for you to install the twin motor 480 or 540. ESC servos and etc. However, you will need to check out with your local hobby shop if they have conversion kits for you.
http://cgi.ebay.com/ws/eBayISAPI.dll...MEWA%3AIT&rd=1
Thank you."
So there you have it. They can be made r/c. Good luck with your project and send pictures as you do it if you can.
Tug