LS7 Head Flow Data
http://www.gearchatter.com/viewtopic11202.php

Plus, we have someone working on building up a C5R block with these LS7 heads:
http://www.gearchatter.com/viewtopic11194.php

<spam>
Keep checking out our board. We have given away 20 copies of Will Handzel's book about building High-Performance LS1/6's. We will be giving away some LS6 intakes and a wideband O2 kit in the very near future as well.
</spam>

If you haven’t seen it, you might be interested in this information as well:

Dyno Results - LS6, LS2, and FAST Intake Tests on an LS1
http://www.gearchatter.com/viewtopic10974.php

Dyno Results - LS6 Intake on an LS2
http://www.gearchatter.com/viewtopic11052.php

Dyno Results – Magnacharger on an LS2
http://www.gearchatter.com/viewtopic11122.php