Driving RHD is obviously something that is natural to me having done so for most of my 35 yrs. on the road.
But after driving the GT40 in America I found it very easy to adapt to. The RHD GT40 has the gear lever on the right anyway so guess it was again natural to me.
Regardless the gear lever will stay in the right hand use situation. The only concern is overtaking on narrow roads as you will need to move well over to the left to see past bigger vehicles.
The biggest problem I found driving LHD was remembering how to do right and left turn hand turns - not to mention driving through carparks..
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You find that you quickly adapt to the centre of lane and on the track one you hit the strips a few times you soon learn the line up point on the car.
I think that either left or right hand drive would be no problem there. It all depends on the way you want the car to look - period detail.