I have been reading through all of the threads on this topic I can find, and just want to make sure that I have identified all of the major steps.

1) Pull engines/transmissions
2) Have 240 flywheel balanced and use it to mate 4-speed transmission to 617 engine
3) Shorten drive shaft and shift linkages 4 inches
5) Install 617 engine with 4-speed transmission
6) Splice together electrical and vacuum systems

Some of the threads made the swap seem easy, others like a major pain. Should I expect a major headache? I am trying to decide if I want to attempt this or if I should just find a new 240 engine. Thanks –Bryan

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine