crank/main bearing clearance

I'm helping Brian put it together. Just got the crank dropped in and mains checked. haven't had a chance to do the rods yet. My back is acting up again so it'll be a couple more days till I can do that. The block is freshly align honed with ARP studs installed. Our machinist has always done things right in the past so I'd think it's right but the next step is to pull the crank back out and check the i.d. of the main bores to verify they are right.

Thanks for the tips and confirmation everyone.

whats the no.1 measure?, when you get a chance.