Ok Holger, Mike has told me you have started the process,on most of our 350's we use cub cylinder on methanol (drag race) and have about 95 RWHP and no issues with crank, wait until you get this new crank you will like very much.
Noch dazu seine Antwort auf das Crankcase bzw. ob sie es modifizieren.Hab auch mal gefragt ob die V-Force 3 die beste Membran ist

Holger really none to the case, the pipes have alot of over-rev and we shift them at 13,000 they make max power around 11,000 so we never let it go below that, and yep we use VF3
Gruss Holli