68 barracuda flip top gas cap

starting my restoration now, just installed the gas tank and filler tube. My question is , on the back of the flip top gas cap is there a gasket between the gas cap and body? or is it metal to metal with 3 Philip screws?
Is that Tommy the Cryco?
I'm in the process of restoring a 69 Fastback Barracuda now.
Link to my progress Photo Album in my signature.
Also have a build thread going. G3 Hemi 69 Barracuda Fastback Father Son Project A lot of learning as I go but going...