Help with Slant 6 oddity identification

Gentlemen you are correct. I used the wrong terminology. There is about .020 spacing difference between a couple of the holes. The aftermarket SFI flexplate I got from A&A doesn't fit as they are much more staggered. Rick Alison advised that if I had the one that looks even there is not an aftermarket SFI plate for it.
I would suggest looking into using a SFI small block flex plate. On a normal slant six crank, you need to elongate one hole, and it works. It might work for you. To save money just get a used stock 318 flex plate, and see if the bolt pattern matches the crank.