Had the car back this week and inspected the fuel line repair. No leaks, but the new line was still "softer" to the squeeze than the OEM nylon line. I had a small hose clamp and decided to use it on the new part of the line at the brass splice fitting as a safety measure. Tightened the clamp and........pssssssssss........fuel dripping. Not sure why adding a clamp would cause the line to leak, but , nothing surprises me about the ol' GP anymore....

So up to Advance for some 3/8 reinforced fuel injection hose and FI hose clamps (no slots in the bands). Sliced the nylon off of the fittings and installed the hose with double clamps at both ends. Hose was a little looser on the barbs than I would have like but held tight with the clamps. No leaks, and hopefully I am done worrying about this. Next stop was a complete new fuel line for a hundred and change at GM parts direct.

I appreciate the advice and assistance from the forum members here.

FWIW, there were no more of these nylon line repair kits on the Dorman rack at Advance....not sure if Dorman stopped making them or Advance stopped carrying. Either way they shouldn't be selling these things unless they can get them to work properly.