Run away from LoveCarft. They're conversions are quick, cheap, and simple. Which is nice in the short term. But in the long term the lack of heating is a huge problem. The biggest issue with they're conversions is the fact that you are starting the car on cold veg oil. This is the WORST thing you can do for the engine. They claim that you can do this in the MBs because the fuel is sprayed over the glowplugs which heats the veg oil and makes it burn properly. My argument to that is if you have cold veg oil in the system it isn't going to spray properly out of the injectors becuase it is too thick. This is a huge problem. If the injectors aren't spraying correctly you are going to destroy the engine in short order.
Grease Works is in Corvallis, which isn't too far away from Portland and they do conversions, and they do them well. They have conversions that have been on the road for years and years.
I agree with pizzachef if you install the system yourself you are going to be able to troubleshoot it. Whereas most mechanics won't know what to do with it.

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