Thanks again! I missed the part about the Chevy Box on the Brownie Link.

What I have now is a 1-ton with 5.14 diffs and 33" tires. I also have a 4.10 third member available (with detroit locker). If I keep the 5.14 I need the .73 OD. If I install the 4.10 I need an UD. Anyway your chart gives me the information I need if I should find a B-box.

Izzy