Ok good luck keeping a new 704 block together at 550+. What once was 850 whp capable on stock blocks no longer is. Busting below 400 HP it's detonation no doubt.
I honestly wasn't ultra concerned at first since I knew I was running at 500 whp without failure. It wasn't until I was contacted by random people with cracked cylinder liners under 400 whp that I became alarmed. It was a large number of motors, from stock, random shop, to Cosworth.
I really don't care if people don't want to listen, if they want to run stock blocks, or if they want to sleeve. I'm taking care of Element Tuning motors and my customers with a solution I've confident works better than other solutions I've tested.