Good afternoon all-this is my first post here .  I have a 1970 GTO that is getting a 455 installed ('73 block casted in October 1972 with 6X heads).  What alternator and power steering brackets do I need?  I know the brackets have to be the same year but any advice?  Thanks. 

 

 

Welcome to the board.

Just to start with you would need at least items/parts 1-9 off this list from Ames Performance.

https://secure.amesperf.com/qilan/Search_Web;jsessionid=BB95EECA2900C8A18BCA2710BB4497F4?order_number_e=MzE3NDEyMQ%3D%3D &method_1=&method_2=&on=Y&search_method=3&cat_rowid=1&search_year=1970&cat_sec_rowid=12&cat_sec_sub_rowid=1189&sort=0

And you are correct most issues come about when you try to mix & match.

Best of luck

Hi there, when I had the alternator replaced, the bracket came as an option to it. I ordered mine online, it was an aftermarket piece (https://www.carid.com/alternators/), and there was a dropdown menu allowing to pick the options. So there I selected the bracket. Must say, it was slightly different from the OE one I had originally, though it still worked fine. That was my solution.