When the Germans upgraded the Czech Panzer 38(t) to make the Jagdpanzer 38 (Hetzer) they moved the driver from the right side (38(t) to the left, to accommodate the gun. If you look at the 38(t) it doesn't seem like a big change - just flip the controls.
In the T-34, the swap also looks simple, except that the driver's right arm and leg would be crammed right next to the suspension springs. A British T-34 would have probably left the driver position as is.
OTOH, it could use the same driver controls as the A-34 Comet, which was a Christie suspension tank and also had a RHD. The driver compartment was pretty cramped, though: