hi dennis,
it’s just occured to me,seriousley who would know the answer to this one.my old mate richard stanier,he owns a very late “b” registered big j with a 180 in it.richard or “the brochure king” as he is known on big lorry blog would have a brochure or two on guy big j’s.as delboy once said “what can’t speak can’t lie”.
regards andrew