Pat,
IMO the absolute factory specs may or may not be of use to you. I would suggest the best route might be to take the car to a modern accident chassis alignment shop, those guys are set up with laser measurements side to side etc. Corner weighting scales are another more rudimentary way to assess whether the chassis is tweaked.
Good luck,
Julian
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.