Engine Oil Pump Clearance

No, ARP doesnt care really. Teh "best option" is the ARP stud kit, and the 12pt nut package that sells seperately. I dont like grinding oi pump bodys. I run the 12 pt nuts, and trim the stud down so the pump clears with no gasket, and the stud is long enough to just catch all the threads with the washer. Teh stud should be measured during the mock up assembly. Indy are a bunch of incompetants in 90% of the dealings you'll have with them. Hughes is great, right up until you try to question their judgement or procedures.