Well, I’m no expert on Trans Am racing and Sports car racing. Especially for that era. But I have spent some time studying books in the past. Mainly thumbing through books at barnes and noble about 15 years ago. And then some googling here and there over the last decade. My last google attempt a couple of days ago showed me a good website.
http://www.racingsportscars.com/photo/Le_Mans-1972-06-11.html
It had a similar page for a lot of the racing done in 1972. Sebring, Watkins Glen, a couple of them in Germany. Etc. Etc.
There are a few cars off the top of my head that the game has, that pretty much adhere to those same cars back then:
I think they would be:
GT40MkII (prototype)
69 Camaro (5 liter Trans Am)
68 Ferrari GTB “Daytona” (not sure what class it would’ve been considered but I’m guessing 5 liter. Since it was 4.4.) It raced at many of the races in the US
The Ferrari Dino Also raced in the US and I think at Lemans in GT 2.5 I think
Doesn’t the AMC Javelin AMX qualify? I forget if that engine is correct in the game. I do think the 5 liter deal came towards the end in the real Trans Am series and early on the engines didn’t have that constriction. But I can’t remember if I’m correct about that.
The Alfa GTV
The C2 corvette. I do believe one raced at Lemans with a 7 liter. Albeit it seems the majority of Corvettes in 72 were the newer C3. I’m not sure about 68-71.
I’m not sure where the Shelby Cobra’s enter into the picture. I think both the Daytona and the regular Cobra were raced at some of these races, but I’m not sure…
But then you have a bunch of cars that are close but maybe the wrong sized engine, or some other distinction, Like:
the C3 corvette with the 5.7 (But even with this, at Lemans they weren’t required to race with the 7 liter, it’s just that a lot of them actually did have the 7.
The 69 Nova (There was one at Sebring I think, but I don’t remember what size engine)
Oh crap, I gotta go take the kids to gymnastics… But there are more cars to be listed.
I think the big thing is trying to figure out how to spec them, and what class. Like should race tires be allowed or maybe only “Street tires” Seeins how tires were not as good back then. I tried looking up lap times for these cars the other day but I didn’t get too far with that. But you could compare how fast they really were and then maybe come up with a spec that would be close to not exceed these real life times. I’m thinking.