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>There might be a small problem with this. The gap above the outer edge of the >piston at TDC is called the squish zone and it is important that this be rather >tight (~.040".) If one side is much tighter than the other this would make a >difference, so a lot depends on what the difference is in the combustion >chambers that makes this one larger. You could also flycut this new head to try >to match it to the old one. > This is the concern I suspected....my deck height averages out to 0.055 inches so I can't get to the 0.040 squish height even without shims. With the 0.030 shim one bank and none on the other my squish heights would be 0.055 and 0.085. Too much? Too big of a difference? I don't have ready access to the equipment needed to flycut the new head or I might try that. If it is really a problem to run with that much squish height adn or squish height difference I could postpone the head R&R until next weekend and push my luck for another week with the existing head. Other opinions... Shad? Russ? Thanks for all the advice so far. Later, John Jaranson '71 FI AT Fasty (Jane - Darkside Project) '66 Square (Sophy - Daily Driver) About Half a Late Square (Organ Donor) http://mywebpages.comcast.net/jaransonT3/jaransonT3/ http://mywebpages.comcast.net/jaransonT3/notavwclub/ ------------------------------------------------------------------- List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org