Great site! Wasn't aware of the gearbox failures. I was wondering if any 426 owners have had the CNC head porting offered by Works Racing? They claim a 15% increase in head flow right in the middle of the meat of the powerband. That translates to a nearly 5 horsepower increase in that RPM range. I have emailed Greg Bates at Works to get more information and to ask a few questions such as if there are any carburetion problems that might arise after installing the recommended #175 main jet? (#162 is stock). Greg assured me that the engine will carburate cleanly. Anyone with experience with this?