I agree on all of those factors. For my 56 swap onto my 2001 Dakota, I want to locate the fuel tank behind the rear axle, mostly for weight behind the rear axle. My 56 will be a year round daily driver with 2WD up here in Green Bay. I have driven three 2WD Dakotas up here in WI since 1996. With the right tire and the right driving skills a 2WD pickup does fine, but with weight to the rear it does help. Another goal is at least 20 gallons of fuel load, so I can get more than 350 miles from tank to tank. I hope to have a fuel filler door on the left rear fender versus under the bed or behind the rear bumper. The C-body fuel tank may be the choice to work with if I can do the fuel fill routing where I want it to be.