Happy dyno is right. But I’m not surprised a tired slant can pick up 62hp on a fresh rebuild with headers, intake. and 4 barrel. They dynoed the original tired slant and got 70Hp. I bet they shaved the head .100” to get the compression up and a bigger cam to go with along with it. Let’s just be happy they did a mopar and a slant six at that. I call it a win. Nice little motor. I’d take it.