I have a 1971 Chevelle SS454 and the casting # on the block is "K28\9. The vin # on the front pad matches the car. I bought this car as a matching #'s, but I am curious about the casting #. I've researched the car and it is an early '71 with a production date of "08/25/1970". Usually the casting # of the motor is within a few weeks to a few months of the build date, but I've heard they had so many of these blocks back then, which they used for 427's and 454's, that many times they would just...
casting #3963512 big block 454 or 427?
casting #3963512 big block 454 or 427?
