I tested the above tube. I coated it with oil, heated it with a heat gun to 200 degrees F and sprayed it with carburetor cleaner. Why carburetor cleaner well it is the nastiest stuff you can use. It kills bugs on contact and cleans grime gasoline will not touch. Though it passed the cab cleaner test, the tubeworked for a year and then fell apart.
The final shortened tube has a 1-1/2" ID pipe cut to length with the tube slide inside and the JB Weld sandwiched in between. I touched it up with engine paint.
Here is the installed tube.