Need help with lower control arm identification

[all wired]

I wanted to see if anyone recognized these lower control arms, I am trying to find out who the manufacturer is to see if they will be suitable for my current project. They came off a 70 Nova so I know they will fit on my 68 Firebird, but Im concerned with the spring pocket, I need the pocket to be at stock height. Any help would be greatly appreciated.

Thanks
Jason