I'm a bit confused by Rob's description of the process, as I don't think you need to disconnect fuel lines to replace injector seals. You can unbolt the fuel rail from the intake man. and by careful rocking and wiggling, pull the injectors from their holes in the manifold runners.

There's enough flex in the fuel lines to allow this on our 83 - maybe newer ones have a different design. The seals on the injector bottoms are the only ones that can cause an intake vacuum leak. But it may be difficult to replace the bottom seals without removing the injectors from the rail, in which case replace the top seals too and all should be well.

While the injectors are out of their holes in the intake, take a Q-tip swab dipped in acetone (nail polish remover, or lacquer thinner) and clean the gunk from the seating surface of the holes. Be VERY careful nothing falls in! This will help insure the new seals have a clean surface to seal against.
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Bob (son's 81-244GL B21F, dtr's 83-244DL B23F, 'my' 94-944 B230FD; plus grocery-getter Dodge minivan, hobbycar MGB, and numerous old motorcycles)

Good luck with it- note that you will get some fuel spray as you crack the fitting loose at the fuel rail supply side (rear).
Disconnect the battery, wear safety goggles, and try to wrap it in a rag as you turn the fitting nuts. YOu'll probably want to soak it in PB Blaster starting now, and definitely need to use two wrenches to get the fittings loose. They are TIGHT!
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Rob Bareiss, New London CT ::: '87 244DL/M47- 230K, 88 744GLE- 220K, 82 245T-181K Also responsible for the care and feeding of: 88 745GLE, 231K, 87 244DL, 239K, 94 855GLT 189K