Okay after searching long and hard trying too find a GOOD source (Transmission Center sucks) for a speedo ratio box for my truck i found a website,And when you call them someone picks up and they WILL Call you back like they say they are.

http://www.mrspeedometer.com

they have a parts catologe with all the parts and even the correct ratio! Unlike transmission Center who could only get it close to the 1.3846 i needed and still wanted 80+SH

http://www.mrspeedometer.com/MrSpeedometerCatalogue.pdf