Is it just me or is this not really a solution? No matter how high you back stuff the valves in any head you still need to check for valve clearance. You aren't just looking for room between valve and piston but you are also looking for room between valve and cylinder wall when you are considering camshaft in a W motor correct?My dad had the valves on the heads recessed or put higher in the head to avoid the pistons hitting. I remember saying this. The cam i don't remember.