I was considering a blackwall or whitewall 7.75x14 Goodyear. Then having the blue line added. There used to be a local dude that did this.
But I can’t even frind 7.75x14” any Goodyears.
You can do it too, just head over to the local hobby or craft store and pick up an assortment of blue permanent markers. You'll be amazed at the results. I had a Goodyear white (line) with the same width sidewall "line" as a red line and made it into a perfect spare red line tire for the '68 RR. Find a bad white wall junk tire to practice on to get the color right and save lots and lots of $$$$. This used to be a white-line tire.