The part Numbers you gave tell me that they made 2 housings in 68. The non ac is the same as 69. That’s what I was looking for. I know how to tell those apart. The top hole is lots shorter for the ac one. I did not measure that one buts it’s like .200”. This housing I am replacing has two pitted surfaces that need machining so they will seal. It’s Easier to put on an aluminum one that I had handy. It’s just the difference in this bad housing is so far off from everything else I have in the shop with the same casting number. It’s hard to tell if the belt alignment was off until I get it all bolted up. I can’t use a spacer on the top bolt with the federal pump on this car. I’d have to machine some off of the bottom bolt hole to get it like the rest. I just can’t figure our why it is so much different. Thanks