I will and, thanks so much. All info appreciated.Groundhog, just a note relayed to me by DB a member on this forum.
If you look between the cab and the bed of your PUTruck, you might see that there is no apparent connection between these two parts of the PU Truck cab and bed.
You might see the frame rails and the exhaust, but those parts may not be making a good ground connection between these two parts.
A continuity check may be helpful here, but I never checked this out either. I don't have a truck anymore, but DB has suggested, to be sure, ground the cab and the bed well (metal to metal) together on both sides.
If you check this out, please let us know.
Btw, my whip was purchased in 1967 by my Dad and there is no set screw adjustment on it. Just a straight whip with the threads on the bottom and the place for the wrench. It's one of the old originals I suppose. But, I'm guessing. Maybe the originals had the set screw adjustment.