When the gas shortage of the 70s led to the national 55 mph speed limit, not only did the popularity of CB radio explode, so did the use of radar detectors and accompanying advertising.
Do you remember when Bearfinder Radar Dectectors in the late 70s period around 1977-1979 sponsored a multitude of Cup drivers, including Peter Knab, Lella Lombardi, Bruce Hill and Dick Brooks?
Here's a few photos of the period:
Lella Lombardi at Daytona - remember Kansas Jack, also?
Bruce Hill at Michigan - Ken Cole photo
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"Any Day is Good for Stock Car Racing"
updated by @dave-fulton: 12/05/16 04:00:58PM