Please tell me what parts interchange between the 2.45/2.25 vice 2.71->up 8 1/4 axle

This is along what I sent earlier says should work I only see 2 bearings though.p.s makes no sense does it lol how can this kit work in al these applications and other starts 76.DTPLV Chrysler 8.25" 4.10 Ratio Ring and Pinion Gear Set Pinion Install Kit Pkg | eBay

You caint trust that chit.