This assembly is different from the 1915-1917 in a couple of ways. The most obvious is the mounting brackets, but also the tail pipe is longer than the 1915-1917's by 3 inches.
I made these drawings as separate posts in case any of you had advice upon what needed changing...thought it would be easier and maybe less confusing.
As always if you see something wrong, please let me know...thanx
Thank You for your time and effort.