These are fuel assemblyline style fuel ine crimp clamps for 65 66 67 . Depending on year they could be 2 at the fuel filter to carburetor ,2 at the fuelpump to fuel line at the apron and 2 at the fuel sender to fuel line .Sorry i only had a picture of a 67 GT500 to show usage with but you get the idea. The assemblyline clamps are flat on top .The modern clamps have a dimple on the top flat surface like the single clamp in the picture . The ones for sale are flat on top like assemblyline. 22.00 for 4 and 32.00 for 6. Price includes shipping. US shipping only. Paypal friends and family option only please . No checks . PM me for any additional information. Thank you for looking.