I recently purchased a Shelby Cobra replica with a supposed '427 out of a 1967 Mustang GT-500. After researching, I found there was only one '67 GT-500 made with a 427. I know it is a side oiler and the filter has been relocated to the front of the car. On the drivers side front of the block, there is what looks like 9 2 or 9 Z with 352 directly under it. This engine is basically stuffed in the car and it is hard to see much. Is it correct that the build date is stamped just under where the oil filter was originally? If so, I can look for that. Are there any other numbers that will tell me the real size of the block or anything else about it? Thanks, in advance...