Snowskater6996. . .you're in luck. . .here's a link to the Historic TransAm Race series that is still running the cars the way they were set-up back in '67-72 (just upgraded safety equipment that's all). . .I go and watch the race here in San Diego every October. . .the cars are awesome, the people are friendly, and you get to go right up to where the cars are being worked on/prepped for the races!!!
http://www.trans-amseries.com/
There is a very nice green Challenger (#77) that runs in the series. . .it used to be raced by Sam Posey and now driven by Ken Epsman. . .the Challenger is extremely fast !!! You can see it on the opening page of the above link and there are several other pictures of it on the website as well. . .here is a link to it on the webpage.
http://www.trans-amseries.com/Driver...Challenger.htm
These people are very friendly in my experience and are more than willing to share information about their vehicles if you ask. . .I wouldn't be surprised if you emailed the Historic Trans Am Racing series that they would be able/willing to provide you with contact information for Ken Epsman
Here is a link to Maeco Motorsports, they are on of the top names in vintage TransAm restoration/racing. . .although I think they mainly deal with the Mustangs
http://www.maecomotorsport.com/
I have a lot of pictures of the vintage TransAm cars from the last two years, but I don't have any of the suspension set-ups under the cars

Sorry about that!
Finally here is a link to a Colorado racing organization with a large involvement in the vintage TransAm cars:
http://rmvr.com/index.html
I'm sorry I don't have any specific information about the racing suspension set-up of the cars, but if you check the schedule on the Historic Trans Am site and any of the races are going to be nearby you should go and see the race. . .then you can see the cars for yourself up close and personal, take pictures to your hearts content, and also talk to the owners, drivers, builders, etc. . .if you don't have any races that are going to be near you and you still need pic's and info by this October shoot me an email or a PM and I will be happy to try and get some pic's of the undercarriage of the #77 car and see what info I can get about it.
Send me an email and I will send you the pic's that I have of the #77 Challenger from last year in the pit lanes.