Jerry "the Nines Ain't Wild Anymore" cause you're getting them all tamed. I know you got the 149's tamed, and you worked over a 109 and 129 so I assume they are tamed, and it won't be long before you have the 169 all tamed up.
Nice to see you got a 13 fin K341A. Are you planning to open it up and get a good look see at things? Maybe de-carbon and even toss out a couple extraneous gear thingamajigs? I still got em in mine cause I didn't know better when I rebuilt it back in 2001. Someday I'd like to toss out those balance gears and install Dave Kirk's crankshaft weight.
It might be wishful thinking about finding a 169 muffler, but I have always thought someone else must have used the same muffler on their tractor. 4005 IHCC 169's just aint a whole lot for a standard production. Have you nosed around any other places like Gravely or A/C Simplicity or Power King? I think the K341A was in production for at least a year or 2 before IHCC used it so I'd almost bet someone else used the same muffler.
By the way, that's a lot of rototiller hanging off the back of your 109 in your profile pic. I see you put a hydraulic lift on the 109 too. Does it handle the tiller well? Do you just have to hold the tractor back with the brakes?
Ooh, and one other thing on the 169 - we'd like to see more pics and some close ups too. And you need to update Art A. with your 169 Serial Number and the K341A Serial number, and that it's a 13 fin. He's keeping a running tally of how many are still around and the month they were built, etc.