Okay, I want to use 12-point head, black oxide ARP bolts everywhere. But, the only 12-point black nuts ARP sells are fine thread, and of course the bolts are coarse only. I can live with regular hex nylocks, but I need them in black oxide, which I can't find. Anybody know a source? I could also live with grade 8's in a plain finish so I could blacken them myself (I have the stuff to do it). The only grade 8's I can find are zinc plated, which won't blacken with my kit.