H2's are 17x8.5 +18 offset. When I was leveled and running 285/79/17's they would rub the uca at full lock turning left. After lowering the front suspension to stock everything was good. But was very close to touching. With stock uca's the h2's fit fine.
I know you want the oem Ac delco part but I believe I saw a dayco pulley with flanges like you want. You might just have to get the whole tensioner to get the pulley you want.