I wanted to add some info to this so if anyone is interested in these can make the right choice depending on year and model.
First-NO LIFT BRACKETS were used prior to 68, 68 was the first year for them.
Second 70-up Camaros, Chevelles and Novas used the rounded top style. Here is where I'm not 100% positive and that is if ALL 70-up front brackets had a PT# and small hole for the fuel filter hook. SO check out the link to see.
I have seen 70-74 Corvettes with the Sharp top corner bracket.
Hope this helps, Thanks, Rich
https://www.yenko.net/ubbthreads/ubbt...252&page=1