There are RPM a-arms on the truck now... will the 3.3 shafts work with these?? I also snagged a set of four 3.3 knuckles since I hear you need them for the shafts as well. I also got two 3.3 diffs from ebay like suicideneil recommended. Hopefully they hold up for a while until I get some more cash to upgrade to alloy cups.