[Born30YrsLate]

I would say that using a CE block was the standard if it was a transplant...although there may have been exceptions. There is one instance where a 396 Nova Engine(that had work done at Motion) had MOTION PERF or something similar stamped on the back side of the block where the bellhousing mounts (if I recall correctly). I don't think there was a standard formal protocal, just use what was ever available.