23-02-2021, 06:35 PM
(This post was last modified: 23-02-2021, 06:36 PM by Duncan Grimmond.)
It's from "How to keep your Volkswagen alive" , my bible in the 1970's. I think it's a Gilbert Sheldon, he of" Fat Freddy's Cat" and the "Fabulous Furry Freak Brothers" fame. (Giving away my chequered past here)