Have been watching developments of this for some time. When are they going to break out some sound bytes, clips or pics of this thing in action?
It's at least 35% wider than stock. Without the pulley or timing belt set up it's hard to tell if only the center G-Lader bracket (middle of the block) would have to be altered. It seems like all the displacement increase comes from elongating the charger by about a third. If displacement did go from 60 to 75, that 25% increase is likely beefing up the case by 10%.
The G75 billet case doesn't have structural gussets. It's cool the current price of magnesium and the technology available with CNC is allowing the G-Lader to evolve.