I never stated that the r/s ratio was the determining factor of revving an LS bottom end. All I said was that it's not much worse than a GSR, which is what he was concerned with. He didn't ask about crank girdle, crank balancing, oil squirters, rod bolts, etc More so than the crank girdle, the stock LS rod bolts are a weak point in the bottom end. They tend to stretch under the stress that 8k rpm creates.