OD tranny numbers ID please

these are the numbers from an OD 833 I am looking at, can anybody tell me what this came from, want to majke sure its not a slant six or truck unit.
from VIN pad on passenger side: 6B380876 then just below that but still on the pad: pp83 5428 or possibly pp63 5428 , cant really tell if thats a 6 or 8
THEN: from drivers side on shifter plate C-99386 ( this is actually printed upside down)
thanks , Neal