Gotta love the rust belt, eh? I instantly know when I'm working on a vehicle from say New York or Ohio here in Oregon. Pop the hood and all the fasteners that are shiny on mine are rusted to hell on theirs. lol.
Headpipe meaning between the cats and the manifold? Either way, I suggest a full, new, custom bent & hung system. I've heard a Flowmaster 50 on a 2.5 and it wasn't that bad. Also heard a Delta 40 on a Lima 2.3 (basically the same engine as your 2.5) and the 40 was kinda annoying in the higher rpm's. Heard a Magnaflow on a 2.3 Duratec and it's really quite pleasant to my ears.
The tips you want to use is darn hard to do on our trucks because the leaf is in the way. If you had a lifted shackle, it would make the situation alot easier, but still not easy. Don't get your heart set on those....keep your options open for different tips of that tight of down turn. Cure-all? 4-link it on bags! You'll have plenty of room for T/A tips! lol.
Got any pics of the T/A tips by themselves?