You could just swap out the gears with the shims and it will function as long as it is not binding.
BUT, you really should go through the lash adjustment procedure to do it right.
The shims, and the lash adjustment procedure are to make up for the manufacturing tolerances of all of the parts. If the lash is not right, it could cause gear noise at best and/or increased gear wear and/or failure at worst.
On the other hand, you could get lucky and the shims would be right.