New motor, sounds awful?

Well, it took me a while, but I finally got a mate of mine to upload the vid off my phone to youtube. [ame="http://www.youtube.com/watch?v=rTlH2KppTw0&feature=youtu.be"]2013 12 11 16 50 48 580 - YouTube[/ame]
You can hear how clacky it sounds. Never mind the smoke that starts wafting off the engine after a bit. New engines always do that.
The engine hasn't been run since, as there was a little bit (as in not very much at all) of water in the oil. After MUCH testing and elimination, it was traced back to the F-N POS Crosswind manifold. Which not only had to have the bottom milled to fit, but didn't have the correct angle on the intake port faces. So with the manifold tight at the top, had a gap at the bottom. (Hence the leak) As well as the intake retaining bolt holes not being at the same angle as the holes in the head. The piece of junk isn't even remotely fit for purpose. Worst part is, an air gap was requested as part of the engine package ordered. And that piece of sh1t was what we were supplied.
So the old Weiand Xcellerator has been refitted just to break in the engine. (And that's not really the best manifold to use either, but at least it fits the engine, and holds water.