Casting Question?

[STROKED67SS]

OK well I ran my spare heads and they come back as 62cc DBL Hump heads. I ran my spare block casting and it came back matching:
3892657....302.....67....2...Z-28 Camaro
3892657....327.....67....2
3892657....350.....67....2...Camaro
Since the block is by itself without the car to run a vin # check and without tearing it apart. What else can I check to ensure it is a 350 block? I don't know if the heads are original to the block either. Thanks

[Camaro X]

Correct me if I am wrong, but isnt a 327 made using a 350 block, just with a different crank? I am probably wrong with that, but I think I read that somewhere 1 time. For sure though if it was a 302 it would be a destroked 327. I am so confused now, I will keep looking for info on this, but I am pretty sure its either a 327 or 350 which you probably already know.. ek!!