A few more numbers that I happen to have access to right here.

GM 6.0, 2007, used in 1 ton van. 300hp, 360 ft-lb

rods.0008-.0021
mains .0008-.0025
piston to bore .0009clearance to .0012 interference (coated skirts)

This is from the factory service manual

Look like pretty normal V8 specs to me, definitely not tighter.