'67 Barracuda Bolt Pattern

Has anyone gone with the adapters? My dad said that a guy he used to live by had some on his Valiant and they were loose? Did the guy just not torque 'em down enough or would this even be a problem? I don't want the wheels poppin' off at 75 down the interstate if we go this route? What all ya'lls opinion?

The adapters will loosen regularly. At worst, they sound like a CV joint getting ready to blow, but louder (when they're loose)....and do NOT use an impact driver on them, or kiss them goodbye. Hand tighten them, or a torque wrench.