Here is the car / livery that I am using as a guide. Not a vintage T/A series car - but a "newer" non-sponsored build:
http://oi39.tinypic.com/14m88le.jpg
Now on to the project...
It took some work, but the body is disassembled (the wipers will remain off as this is going to be a "race" version and since I am going with a silver base, I left the side mirror in position for paint). Along with the work on the body, the chassis has also received mods to help in the handling department. :) It has been narrowed roughly .080", the pockets for the screw heads have been enlarged using a 13/64" drill bit to allow room for the screw heads to "float" in the pockets, the shoulders of the pockets that the body post sit on have been removed, again to allow for float. Finally, the paint was stripped off of both valences using Quick 'N Kleen citrus cleaner and a little elbow grease - http://www.quicknkleen.com/ - works well and smells nice at the same time.
With opening up the screw pockets, etc, I ended with roughly .050" of available body movement without having to cut off the valences and attach them to the body. Not sure this route was any less work than cutting and reattaching, but I wanted to see if I could get there without having to do the slicing/gluing. :D
The driver has been swapped over to a "race" car driver that I robbed from a new Falcon XB that is part of another project I started this weekend - so that worked out quite well!
Next up is paint (hopefully early this week) - but here are a couple progress shots of her in pieces for those that are interested...
Old driver set up - new driver set up:

Body stripped of everything but the side mirror - waiting for it's silver paint (Dupli-color BFM0383 Silver Met.) :

So far, so good! :D