I have run an aftermarket cross bolt in my Hemi that has seen 9000 RPM if that really matters with zero problems. They were made in North American and I made sure of that 25 years ago. The only real difference is what is cast into the head of the cross bolt. My next Hemi Build will likely have studs on the mains and other places. If no one can see any of the fastening hardware on the inside of the motor why not build the motor with the best parts. Ask Scott to take some measurements on the cross bolt length and the thread length and go buy some American made hardware. They will not cost much so even putting them on the shelf can not hurt.