Thanks for the reply George. I found out that the original LA muffler did fit inside the elbow and was brazed at the elbow/muffler joint. I also tried a new Cub muffler on the elbow and it will work perfect after cutting a little length off of the inlet to make it the same as the original JD muffler.
Quote George: Good luck with yours even though it's green.
He also brought a 1950 Cub on his trip to keep that little green rascal in check
Do you suppose my son is supposed to bring me one?
George as for this question I only wish he could.