The badbenz.con site is a very impressive effort. I have a feeling that this will be one of those cars one sees for sale that says, "have 50K plus invested, sell for 18K". Still, as with most hobbies, it is the effort more than the result.
Peter, Chevy engines that produce a solid 250+hp can be had for less than $2k complete. Fair enough there are installation costs but if one bought a 100K MB with a blown engine it might be worth the effort to convert. I nearly have heart failure buying part for my Ford tractor, God knows what a pair of 450 cam shafts would do to me.