I would try the non-turbo 5 cylinder model for starters. A turbo is tempting, but I wonder if that would just cause additional challenges. But you should get some better advice, since there could be some "fit" problems like air cleaner or oil filter housing problems to avoid.

Whatever you choose, get an engine and transmission together. It would also make sense to start with a 114/115 or 123 parts car, since there are a number of peripherals you will need - like the vacuum controls for the transmission, throttle linkage, vacuum ignition switch, glow-plug wiring, etc.

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Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe