The Strongest Savage Diff Compilation.

[JasonB]

I don't know which other diffs use the 8x16x5mm bearings, but like I said before, if you want to use the bigger bearing, all you have to do is use the Lightning Stadium Diff Cups (HBC8019), and the Flux spiders fit inside those cups just fine; all you will need to do is sand a few thousandths off of the cross pins.

Perhaps the IRC cup will hold up just fine in an alloy bulk, let us know how it works out for ya.