383 rebuild - kinda whimpy on the dyno?

When going with conventional SAE or multi weight oils of 30 and heavier, there is a rule of thumb that is safe that says for every inch of material diameter to allow for .001 inch of oil clearance. That being said, .0024 on the rods and .0027 on the mains is usually good on a B engine with a good high volume oil system. Sometimes to achieve the proper thickness it takes .0005 under sizes bearings mixed with standard bearings with the thicker o.s. shells in the top of the rods and in the main caps.