My older Brother also suggested this one...
http://www.classicchevy.com/chevy-al...1955-1957.html
Chevy Alternator Bracket Kit, Small Block, Short Water PumpExtra Clearance, 1955-1957
Mounts Alternator On Driver's Side
Requires Use Of 1969-Up Cylinder Heads
Extra Clearance For Tall Valve Covers, Multiple Carburetors & Fuel Injection
Mounts High Over Valve Cover
Also Works With Vortec Heads
Will Not Work With Power Steering Pump P/N 53-28