The theory behind the possible out of round comes from the fact that 8740 bolts call for 62/63 ft.lbs. for the proper stretch, where as the L19's require 70 ft.lbs. for the proper stretch due too the higher tensil strength of the bolts 180,000 VS 240,000. Those torque values come with using moly lube, not regular motor oil.
That's what torque was called for on the Lunati promods rods that i bought with L19's and all Eagles with 8740 calls for 63 ft.lbs.
Funny thing is that RMS, doesn't change out the bolts on their engines, they claim that the 8740's are good enough as long as you change them on every rebuild.
JMO
Zip.