I put this in your other post, but wanted to share it here too.
I bought these:
https://www.summitracing.com/parts/sum-776106 for my 64 Tempest.
I asked B-man about a kit he bought from PY- he thought they were an Energy suspension kit from a 64/65 Elky. I asked Ccass, and he thought that may be correct, so I started looking...
I went through E/S's install guides and part numbers for the 64-67 A body cars- this kit has just about every one of them... I'm thinking the square rad mount might be the difference maker. I haven't installed them yet, but the kit is all E/S part numbers, so I'll let you decide who makes them for Summit.