Ken Block was photographed recently making another Gymkhana video driving a first-gen Mustang with all-wheel drive. I have been trying to find more information about this Mustang with no luck. My guess is the builder took an AWD platform and wrapped a first-gen (all fiberglass I think) Mustang body around it. If anyone knows more about the project please leave a comment or use the contact form.
Source: Road&Track and Carscoops via Jalopnik