70' Fastback subframe?

[t70stang]

Hey yall this is my first post here, and I know there aren't nearly as many mustangs on this site as chevys and mopars but I was hoping someone could help me out.

I've got a 70 stang that I picked up some through-the-floor subframe connectors for. I'd like to see if anyone here has any experience with this type of frame connector and if they have any suggestions or comments. Thanks alot guys.

I'll post up some pics of the car in another thread.