He could have got the same numbers for alot less and still use a single cam. I think he may just have liked tinkering with aftermarket but barely half of what he did was necessary for those numbers with a single cam, and he made it harder on himself using the d15. Different strokes for different folks though, I'm not knocking it. To each his own.

I wouldn't mind having that manifold though, looks like you could even still fit the a/c in with a little finessing.