No, those cars are Grp 5, bigger bore sports and GTs from 1960-74. Corvettes, GT350s, big Jags, RSR's, etc.
I ran Grp 3 which is about the same period for Historics, but smaller displacement.
Back to the car: the ad states it has aluminum hood, doors and trunk? Alloy trunks weren't used with the bat-kit, they aren't strong enough to take the downforce.
And the hoods on both of those cars had trick modern latches that popped up, so definitely set in fiberglass. You can see them (& homemade splitters) clearly here:
EDIT: My bad! Splitters are the stick-on repops, installed backwards!
Either the ad is erroneous or much has been changed on it in the past 10-11 years. Don't get me wrong, they're nicely built and seemed dependable.
But if I had built a car to run that class, it would have a duplicate of the factory suspension, rear-mounted alternator, slide-throttle injection, and centerlock
BBS wheels shod with Michelin TBs or gumball Goodyears. I'm a slice-of-time purist about racing historics.