Going to be swapping a 6.0 in my obs 2 dr tahoe. Ive found several engines. The question is, how can I identify what engine is which? I know DBW is the newer engines, but how else can I tell the difference.

I'm looking at a 6.0 that's suppose to b out of an 07 escalade. How do I tell if this is an actual L92/LY6 engine?

Thanks, Wil