I've been playing this mod on Game Stock Car Extreme, and wow. I loved watching C.A.R.T. back when they had the 2.65 L v8 methanol turbo cars (approx 800-900 hp). It was like F1 but with less downforce and more give. Long Beach was a good example, where you can see they were sometimes power sliding in real life.
Try that with F1 or modern IndyCars and see them spin. I recall the commentators explaining why, the champ cars (CART) used much less downforce, so they were more dependent on the suspension.
I love the old school mechanical grip!
Oh and by playing GSC extreme... same issue with cockpit not having virtual mirrors! LOL @ the gmotor2 engine. Sheesh!