Apparently the SCCA has decided this year that we don't need change bars in the rulebook to indicate what's different from last year. Oh well. There's a section on a whole new engine in the Formula Ford category spec, and nothing to indicate that it hasn't always been there.
I see from my first quick look at the 2010 GCR that the SCCA will require head/neck restraints beginning in 2012. I think this is a really good idea, but please, people, read the manual that accompanies the device you choose and make sure your installation conforms. For the HANS system, this means paying close attention to the spacing of the shoulder harness mounting points. A mount which conforms to the GCR (4" to 6" center to center at the mount behind the driver's head) should work properly.