"The most spectacular addition to the engine range was a 5.6-liter V8 with 272 hp, which was obtained by giving the 5-liter a longer stroke. For the domestic market, the 5.6 was not used in the SL, however, but only in the S-Class sedans and coupes. The 560 SL was only exported to the USA, Australia and Japan, but as a detuned version with a catalytic converter and only 230 hp because of the emissions regulations in these countries."

I found the above on another page.
I have a Canadian/US 560 SL in Europe and I would like to get the engine up to 272 HP.

Anyone now where to access such info?

TIA