massive reconfiguration time again.

Tube nuts.

Summit Racing® Tube Nuts SUM-220333-6B


-6 tube sleeve.

Russell Tube Sleeves 660641

Then you need a 37 degree flare tool. Altho honestly a standard 45 degree flare works, you just gotta tighten the piss out of it.

I know you not looking to do hard line. Just showing you the parts.