I use an old Vandervell bearings catalog (#112) which has most measures in inches and metric. For the B Mopar engine it reads:
Main bearing housing 2.8175"-2.8180"
Crankpin mains 2.6245" - 2.6255"
I have used these measures both for checking/lineboring and crankgrinding and it works out fine; I normally grind the crank at 2.6250 as a base for the undersizes. Hope this helps you out!