Thanks everyone for your interest!
The heads are the same 243 casting that come on the LS6 in the 01+ Z06 vettes, but the intake valve is a little smaller. But they are great heads. The LS6 also has a little more compression (10.5:1 vs 10:1 for us) and a much bigger cam.
There are two DOD cams out there that I'm looking at: the stock L92 cam (from the DOD G8 GT) has a little more duration and about the same lift, but it should be really cheap. There is also the New Era Performance DOD cams for the G8 GT, but they would be pretty radical in my smaller displacement engine. I think a cam would be fun, but I'm starting to lean towards a 100HP wet shot. It would be a lot cheaper and easier to install. I mean, I still have to do a CAI and some exhaust mods, and at the moment my hot rodding budget has $0 in it because I got on the waiting list for those headers.
By the way, to everyone looking at those headers, they are talking about a one time production run of 60, and I think about 40 are spoken for. That's why I pulled the trigger even if it means less fun doing small mods like the CAI and the mufflers.