Ineed frame tie advice for the '67 fastback please!

If your car is out of shape the only way to get it back is by having it put on a proper frame alignment machine at a body shop.

As far as subframe connecters go…. They all do basically the same thing. You have the homemade, Mopar bolt ins, the more exotic ones that are contoured to the floor pan.

I have seen some very nice ones made by members here. The Mopar bolt ins (that's what I have on my car) will get the job done and are inexpensive (you can also weld them if you want).

Just get whatever matches your budget and installation skills. Any subframe connector will be an improvement. It is one of the first mods that should be done on any a-body in my opinion.