Connecting rod nuts

I replaced the rodbolts in a hemi superstock type engine w/ mopar bolts , didnt change anything , knocked them in w/ a hammer while holding the rod in my left hand.< tells you how tite they were .
That engine was raced for a lot of yrs. , and as far as I know are still in it -----------

I've done it many times with no ill effects. Everybody always recommends resizing the rods. Horse crap.