Neil,
Keep in mind the restricted reach area arm restraints will bring to the equation. On our modified roadster controls were on both sides, ignition, shift and brake on the left, chutes, fuel shut off and fire bottles on the right. I did not like this arrangement when I was driving so when I built the street roadster I did it differently. Ignition on the steering wheel operable with the left hand while steering, everything else is operated by the right hand. Starter button on top of the brake handle, Chute, fire bottles and fuel shutoff in a cluster above the brake handle, shifter is by the right hip. With a left side driver position this allows all the monkey motion to be performed with the hand that has the longest restraint and the left hand remains on the wheel at all times.