Some of the old Ford parts manuals contain illustrations of different clips used in manufacture of the early V8s. Part number specific ones may be different though. Adel clamps come in all sorts of sizes and composition. Some are cushioned and some are not. AC Spruce carries some.
http://www.aircraftspruce.com/search...+clamp&x=0&y=0
Roy may be a good starting place looking for an original type.