Or you could just go a more "normal" route and use BT-60/ST-16 tubing and figure out the scale from there...it would probably be like 1:10.7 or something like that.
FAR simpler and FAR more likely you end up with a model.

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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, TURMOIL, FIASCOS, and HAVOC !