I'm wanting to use a 3 series Detroit locker with a 4 series gear in a Dana 70. The Detroit is a 3.54, the open D70 I'm wanting to use it with has a 4.88 gear. Both are 35 spline. To be technical I guess, the Detroit is in a D70 2-U from an 89 Dodge W250 Cummins, the 4.88 is in a D70B in a 74 Dodge W300. Is a ring gear spacer available?