Not to nitpick, but is that engine original to the CS? It has a '67 air cleaner, and there is no hose to the crankcase cap from the AC either. The chrome lid is from a '67, too.
It would be interesting to see if the numbers match on the block--and to know what the casting number is under the block, just ahead of the starter (C6ME-A? C7ME-A? C7AE-A?).
In any case...you better "baby" this one. Clear a spot in the living room to park it.
Congrats--
Paul N.