Can't help but think you might have been listening to KDSX/950 am (aka "NewsRadio 95".) It and KRRV at 910 were both playing Top 40 at night. I was news director at KDSX in 1970-71. The station was then owned by B.V. Hammond and Lofton Hendrix, both long-dead. BOTH leaned so far to the "right", they could walk normal in a hurricane. They made Atilla-the-Hun seem like a bloody-nosed liberal. Those edits were just the tip of the iceberg! EVERY song played had to be personally approved by Hammond, who just could NOT understand musical artistic license! Very strange times in radio...much like some of the goofy management we still see today. They were just ahead of their time!
---------------------------------------------------------------------------------------------
The original poster said he was in Denton when he heard it. Did KDSX get to Denton at night? I know the 500W daytime signal didn't get to Dallas. I also knew quite a few folks in Dallas who had KRRV/KIKM on 910 as the middle button of the five pre sets on the AM radio in their car. At 1000W, 910 always had a good signal coming south.
---------------------------------------------------------------------------------------------