Re: the F5000 engine builders thread - here are some period articles from US magazines and weeklies covering Al Bartz, Traco, and George Bolthoff. These are overviews and semi-biographical so some info is by nature repetitive. The period how-to articles re: the builders' engines are possibly more interesting.
Al Bartz appearing in a 1968 Sports Car Graphic article:
Edited by 10kDA, 09 February 2025 - 02:08.