Federal P/S pulley and sm block mounting brackets 68,69

I could be wrong but seems to me a Federal pump would have the same brackets for 318 w/ cast iron water pump most any-body. The Saginaw pump I bought for my 273 was part yard yellow marker I.D.ed as 67 383 and bolted right onto 67 273. Correct pulley on it too.
I think most of the bracket difference is in pump brand, Federal, Saginaw, TRW, before the aluminum water pumps anyway but... who knows?