Both sides are beveled. one side has a bigger bevel than the other. I have the pro set ARP bolt, part number 208-6401. Yeah, I don't know how close they come but ARP said that there are no clearance issues to date with the "defective" batch they sold hundreds of.

They're going to be going into a B18C block. So, if you know of any issues with setups you've run in the past, I'll be more than glad to hear them.