Radio systems don't matter much anymore as now they're all wired the same way and use what's now a universal connector. I use Hi-tec HS-645 MG servo's for steering everything from .21 mono's to my gas boats.
I don't know where you're at as I've got a guy in the Chicago area that's a K&B dealer among other things that can help you with everything you'd need to get the boat going, Gary Preusse at 630-27-2451. He's old-school so he doesn't use the Internet but a call to him it's always worth it. Tell him what you have and he'll set you up.
As far as the tuned pipe goes, I'd check to see if they have any Irwin pipes in stock. Jim got out of the business years ago and died a few years back. Bob Kensill might be making them now.
The radio system will be fine.
Last edited by Ron Olson; 01-11-2017 at 02:57 PM.