Question on FLM Casters

I've ordered almost one of everything for the Electric Rustler. I was going to order the racing caster blocks but the description reads...

Fits Stampede and Rustler. Made from aircraft quality aluminum for durability and strength. - CNC Machined for exact tolerances **note** nitro steering knuckles/front wheels must be used if mounted to an electric truck.

What nitro parts do I need to order, and what size tires? Anyone happen to have tower hobbies URL's to the parts I need to put these to use?

Dunkin