v8vette84

I will be swapping out my 3.07 dana 36 for a 3.73 dana 36 and I am wondering if you can buy new hardware for the upper mounts on the batwing. (Where the batwing mounts to the chassis) Are these possible to get?

WVZR-1

Are you talking about only the bushings or do you need also bolts and nuts? Where are you located? I have a couple D36 bat-wings with good bushings.

v8vette84

I just need the nuts/bolts. I have bad luck with bolts that look fine and end of snapping. Penetrating oil or not.

WVZR-1

That's M12 X 1.75 hardware and I wouldn't think it's an issue but if you wanted you could buy M12 X 1.75 X 100 bolts and new M12 X 1.75 nuts and I would think prevailing torque would be best.

GM # 11516078 would be the correct prevailing torque nut from GM and it should be on most GM shelves. The correct bolt has been replaced by GM with a # 11516664 and it's way expensive from GM BUT it would have the correct plating properties for use in under-car components. I'd buy new nuts and I'm quite confident you should be able to save/reuse the bolts. The nuts from a local GM dealer and use on-line pricing quotes as a "buyers guide"!