I’m building a 3w coupe and was wondering if a Lemans style flip top fuel door would be considered traditional? I want to mount it on top of the left quarter panel and connected to a trunk mounted fuel tank.
More cap than door? If you mean what I think you do, some iteration of it was standard fare in sports/racing since the '20s. It'd certainly fit right in on a speedster or special, so I wouldn't think it'd be unbelievable on a traditional hot rod. In fact I've got a replica flip-top cap intended for the Cobra kit market lined up for a Vintage-idiom build. This kind of thing: Earlier ones were like
I welded in a threaded bung to receive one on my rear fender of my truck... and elsewhere. I never lose my gas caps.
I have a Cobra kit car filler on my T coupe and one that looks like Bandit Billy's on my Plymouth that I bought from Moon when Dean Moon was still alive. Are they traditional? Don't know and don't care.
— Frenched — did this before our run to Northwest Deuce days. No more spills in the trunk. Worked out extremely well.
I doubt that this would be a problem for your application, but I worked in a Mobil station when late '60s Dodge Chargers were still everyday cars, and I remember a few that I couldn't put gas in because the cap on top of the quarter panel was encased in ice.