Colvin,
Sorry I didn't catch your original post. The sure fire way to find out what your car is, is to trace the dataplate info. Look on the driver's side door (it's still there on a 68 isn't it?) and copy all that info down. Once you "decode" the numbers you'll have a nice concise list of the options the 68 came with. I could be wrong but I believe the Sprint models were all 66 6 cylinders. The data plate info will tell you whether it's a GT or not. There are decoders on the net as well as a link to one just a few posts down. Hope this helps and congrats on the find.
Stefan
------------------
66 Standard coupe
200 inline 6 - Pertronix ignition, Flamethrower Coil, K&N, Clifford Perf. 6 into 2 headers, Holley carb, three row radiator
96 GT Convertible
Bosch Platinum +4 plugs, B&M Ripper
K&N, removed air silencer, Tokico non-adjustable struts/ shocks (more to come)
Next up: 3:73's and side exhaust
www.mustangworks.com/cgi-bin/moi-display.cgi?258