O ok. I dont know if it makes a difference, but Im working with a 300D flywheel already. I was thinking, If I were to set the engine to TDC, mark the flywheel with a chisel, and set the new engine to TDC and install accordingly, would that suffice?

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1982 300DT *4-speed*// proper 617 donor for conversion // W126 big brakes // front wagon swaybar // european lights & bumpers // rear headrests // lumbar support // warning triangle // overdrive water pump pulley & 9 blade fan // Too many more to list Dark blue/ Palomino.

1983 300D euro no longer a 4 speed. . swap/parts carr