Right. Per RockAuto that was '11 for the pickups. That coincided with a big upgrade in front drive hardware. The 8x180 hubs and corresponding outer CVs have 36 splines, while the 8x6.5 & CVs have 33 splines (most likely the same 33 splines as the large FWD cars and C7 Corvettes). The older inner CVs mount to the diff output flanges with 6 bolts, while the '11+ inners mount with 8. I have not yet done enough research to figure out if there's an easy way through that, like if the old outers spline onto the new bars or if the new inners spline onto the old bars. Worst case, I get DriveShaftShop or similar to cut me custom bars to plug into the new inners and the old outers.ericjon262 wrote: ↑Fri Feb 19, 2021 11:15 pmFYI, although I'm sure you already know this, later model(07+IIRC) GM 8 lug parts are 8x180mm instead of 8x6.5" I'm not sure what hub/axle compatibility could overcome that though.The Dark Side of Will wrote: ↑Fri Feb 19, 2021 10:23 pm I do. I snagged a 2011+ 9.25" 3.73 front a few months back. I haven't posted pics of it because I haven't done anything with it yet.
The inner CV flanges sit just inside the frame rails, so I'm not sure I have the space for an adapter plate.