Sal-
Got the pics but none showing the broken 8mm line. Yes, please send what you can of this line, I will gladly pay the postage.
I will bet $$ that the 8mm tube is a black version of the white nylon tube in the 74 models that is known for failures.
Every 74 911 out there should have their original tunnel lines replaced.
Please let me know about any adapters needed.
Len