I picked up a 350SLC 1978 that has been sitting dead for 30 years. Has 4 speed and true euro car. Wondering if or how hard would it be to put the 4 speed into my buddies 1980 280SL or ever wilder idea in my wifes 560SL?

Car is rusty and not worth saving so it has to be parted out...

Any ideas,

Brent