You have me thinking more about it. I am picking up my car and all the spare parts this weekend. I am getting 2 spare engines and a spare tranny with the purchase of the 300D. I like the idea of a old school hotrod that would get killer mileage. I have a ton of mopar parts laying around to build off of. Wish I could be more advice on the Benz part, but I am new to them as are you. I am however, a diehard Mopar freak and love your idea. Do you have any pictures of the old car?

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Y2K Ram 2500 "work truck" - 640hp and 338,000 miles.

84 Benz 300D 56,000 miles- just acquired project in the works