keith blacks in a 340?

I would ideally put forged in anything, but i may be putting together this engine for my 65 Barracuda. I already have some small block parts and am looking to do it less expensively. Can't beat the price of the KB's. My boss hates them, I've heard him say how the hell can the top ring seal with that much gap. He's a Chevy guy and stuck in his ways I think. I'll most likely be using them. Thanks for the input.