There are a couple of reasons to remove the crankcase governor parts. First, never include anything on a race vehicle that is not required either by the rules or by the function, because it adds weight and complexity for no advantage. Second, unless the governor arm is attached to the governor shaft and spring-loaded in the anticlockwise direction, the governor plunger is not going to be restrained by the paddle on the governor shaft, and it may fall off inside the crankcase. The plunger is usually a small moulded plastic part and if it moved around freely it might either melt onto something, or jam between a couple of moving parts (one of which might be a plastic timing gear, for example).
I think it would be unwise to try to use the coupled linkage mechanism between the throttle and choke, so you would need a separate choke control. It may not be a cable though - one of the things you should do with a race vehicle is keep it simple, because sooner or later everything breaks or falls off, so the fewer parts you have, the better. For most types of racing you warm up the engine before the event, so it is convenient to use a simple lever attached to the choke butterfly directly, with a reliable device to hold it in the wide open position. In the good old days, which I think may be still with us for some times of full-on racing, you warmed up on "soft" (or "hot") spark plugs, then installed the "hard" (or "cold") plugs just before the race. Of course you did not allow the engine to idle on the hard plugs, or you'd foul them very quickly.
I understand what you say about Jack, but the man is dead and not able to defend himself, so I'd rather not discuss it.
