Anyone remember these vintage traction bars ?

For A bodys I believe. Anyone use something like this ?

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Those remind me of the old MAS (out of Minnesota) I used to order out of the Mopar magazines. 29.00 bucks. They actually worked better than the "universal Lakewood" traction bars because they replaced the shock mounts. That allowed more action/quicker action. I ran a set on my '74 Dart. I have a set similar to those on my '74 Duster, except they have a bumper in the front. I have a set of universal traction bars on my '76 Duster also.