Dominik - my understanding of the 351W stroked to 427 is that it has a problem with rod ratio, and a ? mark may be forming around the advisiablity of that configuration. Was why I stayed with the 408, and even that is a bit iffy to rev much over 6000.
Wasn't the 427 stroker the engine that the Butcher broke?? And he got deep into rod ratios after that, a good thread on this forum somewhere, or look at
www.cobralads.com
Wilf