Here's one with a twin plug head (and nitrous oxide injection!)....Unfortunately it's not an original head or a pre 45 picture but it is a pre 45 bike!....Ian

email (option): ian@wright52.plus.com

Hi Chris

Are the class rules specific to showing a period case to claim compliance? There are some photos, non-standard heads like the one Ian showed, from land speed, but class rules for land speed are not too prescriptive for the head of a side valve. Bill Gough’s wasn’t twin spark :(

Richard

email (option): Dickie.bobbie@hotmail.co.uk