Anyone got advice where to start with a ballpark rollout for 21.5 motors on 1s? Whatever it is will then be governed down with throttle epa, for my 6 yr old twins. Never know when they'll have another opportunity to run some rug with a track so close to home.

*edit*
I have another question.. do many of you shorten your servo wires? I used to a long time back, but don't remember if I opened the servo up or cut the wire and put new ends on. So what do you recommend on doing this?
*edit*

3 older crc cars and I especially love the T-bar car since I'm the kind of guy who likes old stuff. Old tools, old bikes, pretty much anything old. Love new stuff too, but I find I can have more "stuff" when I go the old route.