[V8] The Faster Rats have landed

[toml99 at todomundo.com]

If the stutter is indeed the clutch packs, then you already have the answer.  Mr "C" has a fresh tranny already packaged up in a classy rolling box....you just need to take your truck to Boston(close) and get it on a car trailer.  Not only that but you hopefully also get some useable lines and that nagging AC compressor out of deal/maybe brakes etc....win/win for both.   I honestly can't imagine owning a V8 without a parts car, and now's your perfect chance.  It's a no brainer if you're mechanic is sure it's the tranny.
The 3 cars that I parted were because of slipping clutch packs.  All slipped under load smoothly without what I'd call a stutter.  All benefited from flush/new tranny filter, with the grey car going from "can't drive it up tilt trailer", to almost fixed, but still slipped only when kickdown occurred.  No/reduced fluid flow and you have problems and all the filters were clogged.  In the end they all got scrapped as I had no interest in swapping tranny's, just to be left with a $3000 car to sell.  Broken engine/tranny mounts definatly can cause a "stutter" and we know how rare that is.  5-speed has more of a "rotational vibration" from that bad center support bearing.  
You love your car and you and the rest of us know that.  Time for a trip to the big city.....Good luck, Sincerely, Tom