Jay Leno is apparently in the process of fitting the M159 6.2L V8 sledgehammer, from the soon-to-be-released SLS AMG, into a 1969 300SEL 6.3 saloon.
The 563hp SLS weighs in at around 1,600kg, the W109 300SEL – depending on where you read it – weighs somewhere between 1,400 - 1,700kg. Remove the original iron-block W100 V8 engine, itself not a bad engine, and I’m sure it will be closer to the former than the later weight.
I can’t get enough of this stuff, Leno is a champion. Cannot wait to see this thing.