Most popular tach in the 70's and other stuff

What about the white headers hemicop mentioned? Was that popular in both the late 60's and 70's?

Sure were - and they were a nightmare to keep clean. Seems like I was always scrubbing and touching up with the "supertrick" hightemp white header paint available in spray cans.
Orange and blue were also fairly popular header paint colors in SoCal.
Oh, and all the colors were 'flat' colors with absolutely no gloss or shine.