Well the update on what's turning into a bit of a cluster****...and additional info if it helps:
Tried repairing the existing line, still a leaker @ carb end just spinning the motor unlit.
Bill's line was already claimed, but big thanks for trying
Called Classic & spoke with a tech guy there, who unfortunately isn't familiar with Mopars.
He did have the 571 & 572 pulled and gave me measurements & descriptions as best he could.
Classic gets their lines from Fine Lines.
The 572 sounded "no way".
Gonna try the 571, which cost $24.99 + $8.95 UPS, but they're sending me an RMA for the 574 at least.
Inline Tube has a # PRE6801 that looks right, but I'll try the 571 and report back in case it helps someone.
Classic's & Inline Tubes' photos show the lines upside down and/or backwards, printed a page of each and viewed each from opposite side of the paper.
Looked all over the FSM & Interweb for a clear photo of correct routing - 2nd-guessing myself - nuthin'.
I guess nobody here has run into this?
Oh, and FWIW, the "KV" stamped hose is rock hard. But at least it's short. (insert wisecrack here).
Maybe my OCD can turn this into a 2-week saga, complete with Waa-mbulance
!