Well looks like my 250 might be a 230. Since I had the head off I decided to take some measurements and seems with the piston at BDC its only 3.25in Deep.
Here is the problem. This is what was stamped n the block.
Here is where the problem came in. My 1973 Motors Manual list the block stamp CCC as a 250 but in my 71 Motors Manual it list CCC as a 230. IS just measuring the piston depth an accurate way to tell?