50chev
According to the info that Chevy Duty parts book has inside the front cover, 1966 is the first year that 327 was an option. A 327 shouldn't be hard to find, but you also can take an early 350 block (before the one piece rear main) and use a 307 crank with rods to get 327 cu. in. This may throw someone off in the future because the block casting numbers will say it is a 350.
Truck Tinker
