Just had the valve lash done today and everything is still in spec. One exhaust valve on the rear cylinder is just a little off, but still in spec. Mechanic checked the cams and the timing chain and did a real thorough inspection of everything he could get to though the top end and said everything is amazingly perfect - really, really clean. One thing he did find was that I had a few bad holes in my Rineharts, which he was able to weld shut. So, all in all I was able to stretch out the valve lash to 40k and it's still in spec.