You either love them or hate them.
I'd only use them for driving around, that's why I dont want to drill any holes to permanently mount them. These cars have such an horrendous design when it comes to vulnerability to flying gravel, road debris, etc. - especially those rear flares.
Anyway, I like my paint a lot more than I care about my reputation as a cool dude.
I know they look cheesy but they are 1972 vintage cheesy and very rare GM original pieces. Those clamps were the least damaging think I could think of to temporarily mount them.
Verne do you have a photo or link of the contraptions your talking about?