I'd go with a 11x6 or 12x3.75.

You can get carbon fiber pushrods from Central Hobbies. www.centralhobbies.com

I bought the titanium ends at first. They are nice, but after I ran out I just make my own ends with the left over push rods that came with my kits. They seem to work just as well.

Welcome to the thread. Good people here. You're welcome, and you'll have a good time.

You won't believe the difference when you upgrade to that first 4 stroke.

Thanks
Barry