Power and Glory is a mod for GTR2 that uses cars from GTL.
GTR2 is a better platform for the older races because of the custom championships.
And they have my beloved GT40 Mk2!

the choice of cars is huge, and even better, theres a lot of tyres that they've added in the game.
I have the game and the mod, and a wheel, its a blast once you get some driving chops down! I was taking an Austin Healey around Goodwood yesterday and it was the most fun I've ever had with my pants on!