Hey guys, This may help. Sorry I don't know how to shorten the url! Comparison Picture of early and late PS brackets for Chevy MODERN L6!
http://s1109.photobucket.com/editor?image=http%3A//i1109.photobucket.com/albums/h430/Roadmarks/Other%2520Stuff/compairbrackets.jpg&detailUrl=http://s1109.photobucket.com/user/Roadmarks/media/Other%20Stuff/compairbrackets.jpg.html?filters[media_type]=image&sort=3&o=4
If the above isn't a link, copy/paste it into your browser; it works!
Best wishes,
Les
