Ok I will try to respond to every one on one post.
The motor is from a CLK GTR and that's all I know, As far as the tranny goes I have no clue what model or what it came from other then it's a 6 speed manual that will bolt up to the M120. It was free and I didn't want to ask questions. Now for planing on this adventure there really is none when something comes up deal with it and keep going. Now as for under hood clearence I am not worried there do to using a shaker hood and bird catcher intake, That helps free up a little extra room under there.