The shop manual initially, but if your looking for the details to an original factory restoration I would get both eventually. The shop manual is going to show you the mechanical side of it and the assembly is going to feature the body and chassis portion. Why don't you fill us in a little more on what your working on? The guys here are really a big help if this is your first time round on a vintage Chevy truck.
Denny Graham
Sandwich, IL
