Dave
Elumaboards are required per the supps. They can be purchased from www.ogracing.com or www.kingratmotorsports.com. There are two different sizes of Elumaboard kits, the supps for the 12 hour do not specify a size. However the large Elumaboard kit is the only one that would allow a competitor to use GCR compliant numbers (height and stroke). I am sure that the "rules nerds" will get a huge debate flowing on this issue.

In the interest of full disclosure, I am an employee of King Rat Motorsports and any statements DO NOT reflect the views and opinions of the management.

cheers
Dave Parker
WDCR HP#97
2007 MARRS HP Champion