The Big Box:
Business class 101 states that if you don’t continuously improve your own product, somebody else will. With that being said, here’s the new “Big Box”. 
The Big Box is a new and improved split case 10 degree Vdrive. The case uses the same gears, shafts and bearings as a Casale Vdrive. This case was designed for big Horse Power for high speed cruising and performance. It was designed for River Cruisers and GN (Grand National) Race Boats. No more needing to cut out the water jacket for large gears.
Big Box Features
1.    7 inch inside wall diameter which will hold a 0% to 100% overdrive gear (1:1 to 2:1 ratio) while still having the water jacket intact.
2.  Wider oil cavity.
3.  Oil sight hole relocated higher up to hold more oil.
4.  Longer water jacket on back case for better cooling.
5.  All standard gears, shafts, and bearings.
6. Available in 3/8 inch or 1/2 inch mid plate thicknesses.
7. All standard external components.
Case Dimensions: 
Standard Billet Cases 9“ wide / 12“ tall
Big Box Cases 10“ wide / 12-1/2“ tall
- The Big Box Cases do not get any lower than the standard billet cases, they are a 1/2” taller. 
Notes: These cases will have their own mid plate and gaskets. They also have two separate water systems.
Recommendations: We recommend using Casale HD (Heavy Duty) Shafts and HD Gears.