slant 6 head shave

Just went to the build thread for my engine, and got some numbers. My 225 engine started with the pistons at .170-.173 down in the hole. Head cc's varied from 53 - 56 cc's. gasket was .021 thick. using this calculator http://www.wallaceracing.com/cr_test2.php the CR comes out to 7.66.
Changing the head cc's to 39 brings the compression to 10.07

Here is a link to my engine/car build, if anyone is interested.
http://www.slantsix.org/forum/viewtopic.php?t=11218