What's the weight difference between a 107 and a 123 or 126? With a little boost and fuel tweaking, it could probably be as fast or faster as the original engined car. The 3.8 liter engines weren't very powerful to start with, but they were lightweight. I wonder if any suspension modifications had to be made, such as springs from a 450sl? Very cool idea, hauling a$$ with the top down on biodiesel, smelling like french fries..