What about the dizzy gear? Is the roll pin sheared? I've got to say I've put a 3.0 together VERY carefully, and still got the cam one tooth off. I'd recheck it all again, taking nothing for granted. Things like cam dowel pins, crank pulley key, slippance of the pulley marks from broken damper rubber, swapped cams, you name it. I find it useful to forget that I put it together, to keep ego from getting in the way of discovery, and I pretend I'm trying to find out what that stupid mechanic messed up...

There's a mechanical timing problem somewhere, you just have to find it.