Not to keep flogging a dead horse here, but something that hasn't been mentioned so far in this thread needs to be addressed. Before you can remove the steering column mast jacket to quiet down the spark and throttle rods, that %$#& steering wheel has to come off - and it can be a BEAR! Since your steering unit was rebuilt within mankind's memory, you might luck out and be able to just pop the steering wheel loose from the upper shaft. But more often than not it has to be coerced into coming off, as it is virtually a press fit. (Would you really want it any other way???) The threads at the top of the steering shaft are more delicate than you might imagine and break easy. Then you are in deep doo-doo and looking at an expensive repair or shaft replacement. Resist the temptation of using the so-called knocker that screws onto the threads and is then struck with a hammer. Kiss those threads good-bye if you go that route. If you are not able to pop the steering wheel loose by placing the removed column between your legs and firmly jerking up on the steering wheel a couple times quickly (after removing the nut!), borrow or order the special steering wheel removal tool. Maybe a Model A owner in your area can loan you his. Otherwise, it's a good investment to purchase this tool, which has adapters for '28-29 and '30-31 steering wheels. Be sure to place a bolt inside the top of the shaft for the screw in the tool to turn against. That will protect those thin threads. Do NOT use the tool's screw directly against the threads!
You'll also have to remove the light switch rod even before the steering wheel can come off the shaft. With the column out of the car, that's a snap. Fold a towel over and turn the column upside down so that the light switch rod tip is at the top. Stand the column on top of the towel, steering wheel on the floor. Then compress the spider with a screwdriver, forcing it downwards. The towel on the floor will keep the upper part of the light switch rod from pushing down and out. When the spring beneath the spider has been compressed enough, you will be able to use a small flat blade screwdriver to pry the half moon-shaped keeper out of its groove. After fixing the spark and rod problem and re-installing the steering wheel, reverse this procedure to re-install the keeper. It's a HECK of a lot easier doing it this way than when the steering column is back in the car.
And by the way, yes - the starter will have to be removed in order to swing the steering box and sector shaft away from the frame. It's also helpful if you disconnect the clutch and brake pedals and either remove them entirely or rotate them towards the back to provide clearance for the bulky steering box to clear the firewall and rear motor mount.
Marshall