For George: Head bolts for a non a/c 65-66 Nailhead that hold the alternator bracket on. Flanged head is 5/8" (socket) .85" @ largest dia. Bolt lenth4.875 shoulder .435" dia; .9" long Bolt dia beyond shoulder: .390"; 2.8" long threads .425" dia 1.15" long __l----------------------4.875--------------------------l __---------------3.725--------------------l---1.15----- Here is a picture.
