No, can't find the VIN. You know how it is, you write it on a piece of paper and then the paper decides to disappear... The guy I got it from still has the cab, so getting it again is no issue.
Here are a couple shots of the engine. None from the "perfect" angle, though.
They are definitely stainless lines, and there are definitely two of them. Wish the engine was here with me, but it's at the shop a few miles away. Not sure if you can tell much from them, other than my shop needs cleaning.
I was doing some quick research here:
http://www.pirate4x4.com/tech/billav...SPrimer/Part2/
found the link in the LS swap FAQ. I didn't see a Flex Fuel Gen III, but I'll take your word for it. I wasn't particularly wanting the VVT and AFM.
It's definitely '06, and definitely 5.3, and also Flex Fuel, so it looks like it's a L59 then. Guess that explains why I can't figure this thing out.