Vapor Shield Screw Size??

[STEVEN DEMASI]

I have a 71 Cuda, i just purchased a vapor shield for the vapor line tubes from the tank to the vent vapor tube. can anyone tell me what the size the two screws are that hold it to the rear fender? I posted pic below that i found online to show what i am referencing.

 

[Adam]

Just a guess, but I bet they are #8, maybe #10. I think #6 would be too small, and #12s are BIG.