ok, here's the info on the pad next to the distibutor port.
D 383
12-18
There's no HP stamped
We went into the whitebook and detremineed that the "D" signifies 1968 and that the date depictes the day the engine was put together.
So, the block was cast in June 15th of 1967, the engine was assembled in December, 18th 1967 and the car was assembled December 28th, 1967.
I'll check on the build sheet on the SPD.