Nick, That is the same MC I have on my 1940 with a couple of exceptions. You are asking about the 11/32" hole. Mine has that and it is for the brake light contact/sending unit. You can see this in the pics attached. The other exception is the numbers on the end cap. Mine has an A instead of the J yours has. Not sure what that indicates so I apologize for that. Just wanted to point it out. They look very similar. By the looks of things, your MC seems to be complete. What parts do you feel you are missing? The spare parts all appear to be for wheel cylinder rebuild and retainer springs for the Huck system. There are 2 springs pictured that "may" be for the park brake lever extension inside the rear drum. Hard to tell, but since they are in with brake parts and I happen to be missing those myself they caught my eye. I have included some pics of a rebuild kit for that MC that I purchased and found I could not use due to the condition of my MC. Look at those to confirm "if" you are missing anything for the MC you have.
Brendan 1940 Chevrolet 1/2-Ton Pickup Restoring Dad's old truck In the Gallery Forum
