carbureted 5.7 - 6.1

I've heard the bottom end is good for around 500 hp stock on the 5.7.

Well if that's the case my 5.7 should have granaded a long time ago. I was pushing 370 to the wheels in my ram (500ish flywheel) and hitting it with a 150 shot of nitrous. I plan on putting twin turbos on the same motor when it ends up in my duster. We are actually getting ready to start plumbing them in a few weeks. We are hopping to see 650 or better out of it. And that's on a stock 105,000 mile bottom end. I'm not worried about it letting go. But I do have a block in the shop that will be getting built for boost. And should see 22-25psi.