Yes both the head and block were surfaced. I couldn't get a thou and a half feeler gauge under a straight edge on the block or head. In fact I tried several different straight edges just in case. Sure is weird it blows in the same place with both sealing rings blowing inward. I've only got a few more races to go to this year so I'll give it one more shot with the cometic. Do you think the difference in the torque between the 110 lbs on the head studs and the 90 lbs on the lump bolts could be a problem?
