patches for the 58 fenders aren't made, except the lower rear section, which is available from
Cross Canada Parts [via your local body supply store, like NAPA] and the
OldCar Centre in Langleythe 60's bed may need mount holes moved, but will work fine as is, don't need to buy anything, the stepbox is the same 55-66 [I put a 65 bed on a 57, no changes]
Bill