Corvette C1
Corvette C4 Grand Sport
Corvette C5 ZO6
Corvette C5.R from GT3 A-SPEC - Didge Viper GTS-R (Red) Rival
Corvette C6 ZO6 - Viper SRT10 '06 Rival
Corvette C7 ZO6 (new series)
Dodge Viper GTS-R Team Oreca '00 red
Dodge Viper SRT10 ACR' 08 - Corvette C6 ZR1 Rival
Mmm! This would be good, and would fit in with Gran Turismo's themed carlist that emphasises families and lineages. I'll shout it from the hills in any scenario, bring back those Premiums! (C5, C6 Z06, ZB II Viper ACR)
The C4 Grand Sport is the best-painted car on Earth.
The GTS-R/C5R duo that appeared in GT3 and onwards (from the 2000 IMSA ALMS, right?) are some great race cars with GT history to feature. With GT7 doing cars in threes I'd love to see the Panoz Esperante GTR-1 join that menu!
The difficult question is the C1, we've had the 1953 model before, but there's so many differences in the model years, style and engine-wise. Maybe a 1958?
edit: Oh, I reread the list and the '58 is what's listed. Neat! Here's hoping the Art Morrison '60 Vette comes back then, too.