Putting together a 54 235. The main caps have lock washers under the bolts. Is this typical?

The problem: Setting the bearing shims/clearance and taking them on and off all the time, the washer is always removing material from the spot face, contaminating my assembly process. I need washers on the bolts as they will bottom out. Can I just switch to hardened washers?

Thinking about switching to ARP. Found an old thread and don't want to go with studs. Unfortunately, the thread was from 20 years ago and part numbers are not different.

Thanks