In the 1960's, I often saw a mechanical valve timing device advertised in Hot Rod magazine. I believe it was called the "Vari-Cam."
[edit] Found something on it.
Go here:
http://www.jalopyjournal.com/forum/archive/index.php/t-84631.html
and scroll down to a post by a guy called "Scotch."
[edit] Found something on it.
Go here:
http://www.jalopyjournal.com/forum/archive/index.php/t-84631.html
and scroll down to a post by a guy called "Scotch."