Rebuilding Original 383 for my 69 383-s Fastback

it is great you have it. I have an Aug 1 68' Cuda 383,(1969 model) but the original was blown in 1976. Amazingly, I found an A body block from a 68' GTS. The build date for that block was two weeks prior to the date(July 17th or so) on my 69', so it was one of the last 68's made.
I feel very fortunate!