I consider myself on the lunatic fringe of doing stuff like this.

But I have gotta say, for a tiny fraction of the time and cost, you could exploit the cubic inches of the 560 engine, or find an AMG engine of the same basic type.

I hope you try it and I look forward to reading the posts on it. But you are dealing with an engine that even very experienced techs find challenging in a production car.

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe