Had a slant six, now V8, Can I swap Power steering brackets?

Check these old posts out. I think they may help you.

Saginaw Pump
http://www.forabodiesonly.com/mopar/showthread.php?t=57309&highlight=power+steering+pump

Federal Pump
http://www.forabodiesonly.com/mopar/showthread.php?t=39542&highlight=power+steering+pump

It shows how the /6 pulley sticks out farther than the V8 one.