Has anyone ever seen a "steroid laced, 350ci, Flowmastered" 1970 or so 280? I found 2 1970ish MBs. One is immaculate and original and expensive. The other has an exquisite body and interior but engine is seized for $500. What would you do?

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1986 420SEL. 200,000 miles plus.
1991 Cutlass Supreme
1980 VW Vanagon (Old Smokey)