[6pack] Head thickness?

[Mark J Bradakis]

Application       CR    Thickness   CC depth   CC volume

GT6 Mk I        9.50
GT6+            9.25     3.450     0.425       34
GT6 Mk III      9.25     3.32       .47        37
(early)
GT6 Mk III      8.0      3.40       .55        44
(late)
TR250, TR6      8.5      3.55       .60        48.5
TR6 middle      7.75     3.54       .68        55
TR6 late        7.5      3.55       .70        57
TR6 race 1     10.25     3.375      .52        41.6
TR6 race 2     12.3      3.295      .44        33
GT6 race 1     10.75     3.31       .385       30
GT6 race 2     12.75     3.22       .300       24.4