Sorry, I didn't think they used shims on the babbit rods....
Knew they had shims on the insert rod bearings, figured the babbit rods were machined to size after they were poured.
The babbit is a lot softer than an insert bearing and the clearance goes away quicker, so it is a serviceable fix that most all babbit engines were designed to remedy back in the day. Model A's and T's also were common to shim to adjust clearances.
