Well, if you have a bent rod, or the clanking could be spun bearings, either way you will need to have the cylinders honed, or possibly bored out to fix that mess. Best get the valve job while you have the head off, of go with a performance head. have the crank turned because either the spun bearing or the bent rod will have done damage to the journals even if you can't see it with your little eye. If you ever wanna do a cam do it now, and go double row timing shain. New pistons and rods are a given as you will have beat yours up pretty good. I might even test the cylinder walls ultrasonically incase there are stress cracks...
