Big Block casting # Hi perf ?

[highpockets]

Found an old BBC engine very cheap,steamed it off and I see what appears to be some conflicting info.I am hoping you experts could help decipher if I have a good one or just run of the mill BBC. Casting # is 14015445 which if I translate correct is 78-87 454 truck motor 2-4 bolt mains.The weird part is above the oil filter pad is cast hi perf pass. The stamped pad on RF indicates CAF159406,intake is 3931067,cast iron 4bbl. I have not torn it down,but have a friend who wants it for an old truck and I dont want to give it away if its a good one(I do have a 67 RS to play with if it turns out to be a keeper Any help/leads would be appreciated.