I have a 1986 500 SEC which of course has a M117.965 engine. I would like to transplant the later 32-valve m119 engine into the car. I have two reasons: first, despite very extensive works, my engine has never run particularly satisfactorily and, second, I want significantly more power. I appreciate it would be easier to fit a 300bhp motor from a late 560 and thereby obtain much of the performance increase with fewer installation difficulties. However, this seems somewhat half-hearted (if I am going to *******ise my car, I might as well go all the way) and, anyway, I prefer the smooth characteristics of the m119. I have done many hours of research on this, from the w124 works thread here to Satish Tummala's excellent pages on the mbcoupes site. I know I need a m119.960 from a 1990 or 1991 R129! My question is quite straight forward: who, if anyone, can I entrust this work to on a commercial basis? Is there anyone who specialises in this kind of stuff or has the necessary experience? I don't think I am up to doing it myself and I am not convinced my usual specialist can do it or would want to do it. I expect it is the kind of thing that can only be done profitably the second time. Thanks for your help.