Take a better look and see if the last letter is a "B" instead of "E". Also the CE22:4 might be OE22:4 which is the date code of 60/May/22nd 4th shift. Anyway it's a 352 block for sure. You can go to 4.05+ safely. When you sonic the block they can tell you exactly how thick it is. I'd also leave some room for future rebuilds.
G.