Search "Rear Gas Tank" to see available tanks and applications. This video will help you understand what's involved while doing this popular conversion on your 63-72 Chevrolet or GMC Pickup. This video will provide an overview of the entire process with highlights focused on a few of the important steps. On a scale of 1-10, the difficulty of this project is likely a 3-4 for most enthusiasts and will take approximately 2-4 hours to complete. Only common hand tools are needed for installation.