Saginaw Pump Bracket

Swapping from the federal pump in my 65 dart with a 273 to a saginaw pump so I can adjust the pressure. Anyone know what brackets will work on my motor? I went to the yard yesterday and the only sag brackets I found were on a few 80 Rams but the brackets bolted in to holes on the block/head that I simply don't have. Am I needing to stay in the early LA applications like 67-73 timeline?

Thanks