hmm, no pad with numbers there either... previous owner said it was a 225 out of a late 70s truck though. Parts I bought for it I asked for 225 and they all fit
Since I have the head off one, I'll go out in a bit and get a picture so you can see exactly where it is. They all have it. Unless the block has been decked at some point. Back soon as I'm done with supper.