I wasn't trying to be disrespectful and it isn't a matter of trust, if models are different they are different. I'm also not an Ingersoll expert. I'm just a guy who has repaired a lot of different tools over the years and dealt with receiving the wrong parts multiple times. You might be right with your part numbers, but it also appears that you might be assuming which model the OP has. Were the anvils all the same internally until very recently? You posted...
Here is the exploded parts diagram for a Ingersoll 2135QTL-2 Torque Limited impact wrench. It's the first and only one I looked up. The parts diagram shows it as using a 231B-A414 anvil to begin with, so if that is in fact a normal impact anvil the torque limiting function is being accomplished somewhere else inside the unit. That's why we need the model number from the OP, because it appears that the part he would need to change could be different depending on which model he has.