Just a tolerance issue. When you get 3" long studs, it doesn't take much for them to be off enough that they will interfere if the holes in the wheels aren't big enough. Everything should be fine once they are bolted up. You could drill the holes in the wheel out a little bit or just whack the studs until they line up better. See if it all works better once you torque up the wheels a time or two. Or not.
The bigger problem is the Moroso studs. They have the same PSI strength rating as ARP studs and generally cost less. You can get high PSI ratings by using good materials or you can heat treat cheap metal until it's brittle. You can get threads on a stud by cutting them or rolling them. Cutting them causes sharp stress risers at the root of the threads. Rolling the threads toughens the material at the root of the threads and makes them more fatigue resistant. ARP studs are made from good material and have rolled threads. Cheap materials and cut threads aren't safe on a road race car. ARP studs might also fix the problem you asked about.
Richard P.
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