need help getting mixed answers. need correct part # exhaust manifold stud

[weider1717]

Wanting a GM original piece to replace all my exhaust manifold studs on my 87 silverado 4x4 350.

Those are the specs and some dealers have said part # 15549352 is correct others have gave several different part numbers none quiet look like the originals.

I have no problem with it being slightly different but when I ebay 15549352 on the ones that let you plug in what year and makes etc your vehicle is it says it is not compatible with an 1987 silver ado 4x4 350....

no clue what the correct original part is then!? can anyone for sure give me a correct part #? Not wanting to go with dorman no other reason other than I have picky as hell with this truck not gonna lie.