I haven't watched his video. However, I had this exact same idea last year at Moparty when one guy showed up to three grand champion events and won all three. He owns a vette, and he borrowed a mustang and a viper. When I was there, I told my friend (crew chief) that we need to build a foxbody that can accept all 3 engine platforms. I would build it so the engine was an easy swap with connectors for the harnesses and exhaust with v-bands. While I do think it will be fun, I don't have the funds for such a task. The cost to this guy will likely be nothing since I'm sure he's getting sponsored parts, and his youtube revenue will pay for the car. After all, this is his job.