Reinstalled muffler, more or less. got seals off, scraped and took a wire brush then coarse steel wool to remove old seals, got hanger up, u-bolt on, and rear mount bolts in place. Nuts/bolts are just on, loose, I ran out of patience.
TIP: I used the wooden end of the same wire brush to hold one bolt at a time in place while raising/installing the bolts on the hanger at the rear of the muffler. Couple of figure-of-eight rubber hangers would've made a lot of sense like the later Hummers use.
Any kind of wooden wedge will work. More grist for the mill of my long-standing hatred for mechanical engineers. I mean, really, who designs stuff like this except for sadistic misanthropes? How many things do you come across in your life where you ask yourself "really? Did they ASK any end-users if the repair/replacement instructions actually made sense to real life human beings or did it make perfectly good sense to them on their paper drawings? Like those bolts that hold the Injector Pump in place? And more, so much more. I had erector sets as a kid, dismanted/reassembled clocks, my first motorcycle was a Yamaha Twin Jet 100 my brother gave me for my 14th birthday as a frame and parts in two orange crates. Harleys, BMWs (three), Kawasakis, Norton Commando even and except for Lucas electrics and Whitworth tools and drippage from the HDs, I got no complaints.
But the HMMWV?
Definitely challenging/interesting. My Tacoma goes in for 30k service tomorrow - engineers designed that so spark plugs take about two hours to replace. I've already paid for that with some extended searvice package I got when i bought the truck. I recall a somewhat popular car from my youth, a De Thomaso Pantera. Engine had to be lowered to change plugs.
Shakespeare said something once about killing all the lawyers. He must not have known any mechanical engineers.
I'll put the exhaust pipe extension on tomorrow, torque everything down and start with putting the fuel tank back.