I replaced mine with 5/16" hand-benadable aluminum aircraft tubing from mcmaster-carr. The same stuff is available at summit racing.

I have done this - this is the way to go. Dont rubber hose patch it.

You will need to drop the down a bit at the differential (4 bolts) to gain better access. I can give you a step by step if that would help.

Its really much scarier sounding than it actually is.

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'85 300D, 'Lance',250k, ... winter beater (100k on franken-Frybrid 3 Valve Kit)
'82 300D, 'Tex', 228k body / 170k engine ... summer car
'83 300TD Cali Wagon 210k, wife's car