I think they just magnafluxed the head. Installed new valves and guides. The head had approx. .009 warpage I think, and they milled it. I didnt put any thread sealer on the bolts. btw what does that front corner bolt toque to. In the Chiltons manual I have it says all torqued to 95 in three step increments 33 then 66 then 95
