I have an extra y8 head laying around.I noticed in one of your tech articles you say you can put a 16 valve head on the hf motor.I was going to throught this head on for my neighbor but I got talked out of it on the internet.The hf block only has 2 valve reliefs per piston while the 1.6 's would have 4.Would there n ot be some piston to valve clearance issues here?Or would it be fine.Has anyone actually done this swap with a vtec head?Any info would be greatly appreciated