Quick answer time!

I've currently got an M117 5.0 V8 sat in my 190e 2.6. It's physically bolted in, but not 'plumbed in' yet. It clears the steering box, manifolds will have to be fabricated, you need to alter the metalwork surrounding the brake servo a little (although with mine being RHD, if yours is LHD, it might be slightly different....) and obviously it needs wiring in.

Aside from that, it's looking fairly straightforward(ish)!

Cheers, Martin

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1990 420SEL 217k Miles
1975 Chevy K10 400ci SBC power!
1995 Jeep Cherokee 4.0 Limited
1997 Suzuki GSXR750 SRAD
1989 Kawasaki GT550G4