Yeah, I remember this when I was kid working on my old '56 Plymouth (it was 30+ years old then). I dunno, but I'd guess it's would be most likely still common with big rigs if anyone, so Ige probably will know.
'91 Pickup - Imelda
'08 Tacoma TRD
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29
"To live is to suffer, to survive is to find some meaning in the suffering." -- Friedrich Nietzsche