Thanks for your comments. The pump was purchased from Advanced Auto and has several languages on the box, so it is not a GM part, but it is "new" not rebuilt. I can't take it back anyway because I have painted it "Chevy Orange" to match the rest of the block. Tomorrow I will visit some junk yards on the week end and hope to find or at least look at the set up of pulleys for water pump and alternator as the basic setup. Funny how I can visualize the various setups for flathead pumps and generator brackets but have no knowledge of the SBC setups, I guess life was simpler then at least under the hood!

Don Shillady
Retired Scientis/teen rodder