Had a little time this afternoon to strip down the engine. I sprayed all the bolts with PB Blaster a couple of days ago. Didn't have any problems pulling bolts.
I have a few hours tomorrow so I'm hoping to get in a first test fit. The wrecking yard did not drain the fluids out, so first up is to drain the oil and trans fluid before I make a big mess.
The fluids look good, no bad colors or smells. Pulled a couple plugs and the engine looks like it was running properly. Looking into the intake and exhaust ports good too. No carbon build up in the exhaust and intake ports look pretty clean.
The outside is going to take a bit of cleaning and dressing up though.
An LS6 intake is about 6" shorter than the truck intake. So that will solve my hood clearance issue. But that brings on some belt/accessory issues, there are a couple of companies make relocation brackets for that. Just mo money!