I agree with all the above posts, but for me if a block is broken in my mind it usually means that is is time for a new one or at least a different one that isn't broken. Even though I know it is very hard to find the correct block with the corect codes that match. If this is of concern I have a suggestion. Carfully remove the date codes from the original block and obtain a different block. Grind down or have a machine shop machine down the codes on the new block and the back side of the old codes (don't get too thin). Either JB weld the two together or use an other method for attaching it like welding if you prefer. Even though the original block is now in the middle of irriversable sergery
at least this way the block is structuraly sound.
