[blykins]

Well, to answer your original question, I would use T&D's...

But...

I wouldn't jump ship over some tapping. The tapping could be a valve adjustment....or rockers hitting valve cover baffles....or worn rockers....or several other things.

The factory rockers are actually quite good for a lot of applications. If they're worn, it's one thing, but I would figure out what's causing the tapping first.