In desparate need of early model 71 dart fuel cap

slantsixdan said

Factory caps were body color. Service replacement caps could be had in primer (for bodywork jobs) or in chrome with chrome handle (for "I lost my gas cap but I'm not going to pay for paintwork" situations). Aftermarket caps often had black plastic handles. See here for complete info on the fuel tank vent system on your '70 California car. Removing it is kinda pointless.

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Thanks for the info. However, I'm replacing the tank, fuel lines... everything... basically every last thing in the drivetrain, mechanical, fuel systems in the entire car is being replaced, and none of my EEC (or ECS or whatever it's called) is in good condition, so in that light, I don't think it's pointless. If I were doing it solely to remove it, then sure.

So, it sounds like I should replace my filler tube with the vented style with vented cap to finish off the job.