500 SEC engine in 500 SL ?

[kris]

I do have an early (1983) 500 SL (107 model) with a broken engine. However I do have an engine + gearbox of a 500 sec (126 type). Would this engine fit the 500 SL? Especially the engine mounts and the exhaust. Could I do this swap easily while repairing the original engine or is it too complex. Both engines are the same type (117.96x) but the last number of the engine code is different.

Any comments greatly appreciated!