Also good news, I found a website that contains a lot of ripped car models from the games Forza 3 and 4, Dirt 2, Driver SF and NFS Shift 2. (I'm not sure if I can post the link here but if you want to mod cars or even port any of those for other games, I can PM you the link, well actually is not really that hard to find)
Anyway, with those models, the process of making a blocko version out of it will be a lot easier and better in terms of details, and they will be way more legit compared with the real life car, so expect better things to come out now.
And yes, this website contain models of the Crown Victoria and the El Camino


And with the Rally Cars Pack, the Dirt 2 ripped models website contains a bunch of rally cars included, and as for the cars Venom, Charger, Dominator and Veloce, there is the 3d models that those cars were based from



(Yeah I know the Dominator is a Corvette C4, but it will be replaced with a C5 because it's the best corvette ever)

(Yes, a mother loving Aston Martin Vanquish to replace the Veloce model which is a Vantage 98)
Expect those 4 cars to be remade in the near future to look more like those pictures of the models, of course after finishing most of my projects on the projects list.