I've had a chance to drive both now, and there's no comparison. The 1972 350 was noisy in the back end - grinding transmission noise. The 560 was unbelievable! Of course, they're asking $22,000 for a 1986 560SL w/65,000 miles. Kelly Blue Book puts it at no more than 19k if perfect, but this one had some minor rust areas, will need an exhaust system within a year or so, and the owner says he had an estimate for lifters at $800. How is it that these cars keep such high value, even more than NADA and KBB list them at??