Yeah, this is the 10:1cr truck block. I'm planning on L92 heads and a pretty healthy cam down the road. A 4-speed swap may be in the works first depended on how this does at the track. Don't worry though, I've got a pair of turbos waiting on it. Its gonna be carbed at first, just to get it running. Then the EFI will come. And finally, the BOOST!
They are supposed to be pretty similar. I think the LS2 has more compression and of course the blocks are different. Your buddy's first gen looks sick!

I noticed he kept the drive by wire throttle body. I'm sure he's got a whole mess of time tied up in that. How much spray was he running then (and times) and how much boost is he running now (and times)?