They film over 2 days and take about 10 hours of footage which is wittled down to about 8 minutes.
Ours was filmed on a Sunday and Monday. Guy was only there on Monday. I was there on Sunday(had to work Monday). Apparently he is a real cool guy. My dad has a 69 Chevelle that Guy parked his Camaro next to(they tow the Camaro behind a box truck from location to location). I know they did a bit of interviewing next to the cars. My Dad's 24' Progression was also in the lot so look for that as well. You wont see me on film(no family allowed).