I was thinking along the line of the engine and transmission being attached prior to installation and that would include the cooling lines. It appears that according to the 64-65 Mustang Chassis Assembly Manual (AM005, pgs 20 and 21) for at least the V-8 application, the transmission cooling lines go in after the battery ground (as shown in view W) as being next to the block with the cooling line bracket on top.
That makes the assembly sequence: block, lock washer(TSB?), battery ground, alternator ground, cooling line bracket, (lock washer?) bolt. Later V-8 cars get a stud with a center hex drive: block, lock washer, battery ground, alternator ground, stud, cooling line bracket, lock washer, jam nut. I've pulled several studs from V-8 cars but I was thinking service requirements, ease of battery ground cable replacement being on the outside of the hex of the stud. Back to the garage.
Jim