69 gtx put subframe connectors in and wondered what you guys use now to get the fuel lines back in place? didn't have a option to put in first, went to dippers. have stainless lines and need a remedy to cut and put them back together, and its 1/2 lines. thanks for any help.

What style connectors...the US Car Tool units that are fully welded to the floor pans or the square stock style? Any photos available of the problem area?

If the lines are not annealed you likely will not be able to flare them. Even if they are, flaring 1/2" SS will require a REALLY GOOD flaring tool. Also be aware that cutting annealed SS with a normal tubing cutter will work harden it. Best to use a small chop saw. HF has one that does the job.
Another option is to use Swagelok fittings. They are NICE but pricey. I do have some left over from a previous project .If you decide to go that way PM a list of what you need and I'll see if i have them.