No it's a FE. Just a later engine. The date code is 64/Oct/14th. 63 and earlier blocks just have 2 motor mount holes. 64 and later 4 bolt holes. Heads and intake are lowrisers. Intake has a 64/Dec/?? could be 30 instead of the 80 you posted. The last 2 numbers are the day of the month it was cast. The heads date codes are under the VC's between the center 2 valve springs. 60 days between the block and intake. I doubt it's original to the block. You'd have to see what DC the heads are and piece it together. Things moved along pretty quick back then. Still tho the right parts are there.