$600 for tires
$350-$750 for original-spec brake system
$150-$1000 spring/suspension parts
$200 front and rear wheel bearings
$100+ for good 6v battery
$50 for good 6v battery cables
$100 minimum for full engine tune-up parts and oil change, and oil/air filters (and new radiator coolant)
The above costs assume a useable radiator (and water pump & hoses), useable electrical system, and good/safe steering parts, and that you do not care about body/cab seals, and exterior paint (and ignore any rust-out in cab, doors, fender, etc).
Use whatever bed it comes with.
Assume you have a good starter, generator, and voltage regulator (and, useable wiring).
Plus: the cost of the truck/shell that gets you started on this project.
Last edited by tclederman; 07/21/2015 12:33 PM. Reason: changed a few parts/prices