Why would you want them to?
I for one would cringe through every minute of the show as I watch them do things wrong or push lame products. They wouldn't do it anyway since, holley, edelbrock, mr gasket, and all of their subsidiaries basically make no parts for turbo regals. Their programs are infomercials and if there is no big advertisers paying for it there is no show.
Besides, do you really want to see a 300 rwhp turbo buick with 5000 dollars worth of mods? Either they would run like 15 psi of boost, or, actually try going for power and blow some HG's and the show will never make air.