I've never seen one that was too long.
If you have other Smiths, pull the yoke screws, clean them well, and look at them with magnification.
Do this ONE gun at a time, or use different tables, or SOMETHING to make sure you get them back in the right guns!
You'll usually see a small flat or bevel filed on the narrow end. That was done to clear the yoke.
Occasionally, the fitter filed the yoke instead. I have no idea if there was a policy to be followed, or if the fitters were just told to "make 'em fit".
So-
FIRST, make sure you don't still have the original fitted yoke screw in another hole! I've seen that a million times.
If not, you can fit the new one.
Pull the yoke.
Run the screw into the hole WITHOUT the yoke in the gun.
Tighten snugly.
With a lead pencil, mark the screw at exactly
9 o'clock toward the
butt. That mark is where you need to file the tiny flat or bevel on the end of the screw where it hits the yoke.
Go SLOW, use trial and error. Be careful running the screw in hard when it is still too large- you can put a nasty burr on the yoke. Way easier if you leave the cylinder out of the mix and use the bare crane while you fit the screw.
You can take more off, but you can't put any back on.