Well I went to install the prototype Shelby diff cover today. Turns out the 1 inner fin comes too close to the 4:10 gears, so I am not going to use it. I figure I would rather see someone use it than have it on a wall collecting dust. This is 1 of 7 prototype covers for the shelby that Ford made, Ford has since destroyed the other 6, so from what I am told, this is the only prototype cover that reamains. It has been painted Toreador red, silver metallic striping. This cover will be up for grabs on here for a week only, then it goes to auction. I am asking 200.00 shipped obo, shipping anywhere to the lower 48 US states, Priority mail with tracking.