All of those cars were really well set up - They all cornered amazingly flat, especially the Ford Fairlane-Thunderbolt. That was a lot more weight than the Alpha and Cortinas trying to catch it and did you see that the little Lotus Cortina (white with olive green darts) was always catching back up on every turn?
A girl I knew in high school did well in school and was accepted into Nursing school in Boston. Her Dad was very proud of her (and being a US Marine, he named his only daughter "Marine") and for a high school graduation present and to help get her to and from nursing school he bought her a Ford Lotus Cortina with that same side-darts-wrapping-around-the-rear paint scheme. She let me drive it once and I'll tell ya, that little box was one hella rocket. 1,551CC overhead cam engine built by Lotus from Ford and Lotus parts and they were strong, bullet-proof engines.
Kinda wondering how a big car like the Fairlane with a 289 or more and an additional 800 - 1,000 pounds ended up in the same class as 1,500cc Cortinas and Alphas, but that's British racing!