Not sure on a '67 if you can by that number if there's not a partial vin,there are also block casting numbers other places.
Hopefully Everett or Gorn will chime in or one of the others more knowledgeable than I.
The number you have I think should give you the build date and maybe engine size,been a long time since I looked one up.
If the build date is 1967 or late 1966 and it's a 350 it's from a '67 Camaro SS so that would be a strong indicator it's original.

 

Your block should have two separate numbers. The number on the right is the engine code and the left is the car ID and partial vin. Below is my car, so for example, the number 18N359266 It translates to 1=Chevrolet, 8=1968, N=Norwood Assembly and 6 digit number are the vehicle’s VIN last 6 digits. If your block is missing this stamp number, then not sure what to do. There are other numbers to ID the block and dates, but no other numbers the can match the block to the VIN. Could check to transmission... it should also have a VIN matching number. Remember, it the last 6 digits.

 

Take a picture of the Trim Tag just above the brake master cylinder and compare/breakdown the tag options at Camaro Research Group
This site will decode the tag showing the options and original color ofCamaro
Good luck

http://www.camaros.org/diffs67.shtml