Also, since I'll have some experienced eyes looking at this thread. Im planning on the following build with this SBE 6.0 for a 72 Camaro to have a nice street cruiser:

LQ9 SBE
0821 LS3 heads with BTR springs
Holley mid-rise carb intake 300-131
230/238 .600/.615 110 CL
Quick fuel 750

What should I expect for power?

 

Doubt you'd ever see newer parts in an older motor, LQ is gen 3 LY is gen 4.
In 2006 they only made the GMT800 platform, in 2007 they still made them & called them classic and also had the new platform GMT900 so a 2007 could probably have gen 3 or 4.
http://www.enginebuildermag.com/wp-...rmag.com/wp-content/uploads/Articles/03_01_2012/986163348GMGENI_00000054947.pdf

Where's the top end?

 

Top end was sold before I got there. Said it had 317 heads on it. I haven't cracked into the bottom end (which Im sure will tell me all I need to know). Are there any places I could check that would have the last 6 digits of the VIN on the block to see if it matched the VIN tag provided by the salvage yard?

 

This is the tag I'm referring too.

 

Late 06 they started planning for gen 4 motors...i have from GM a 2007 6.0 block that is a gen 3.5

This block has the gen 4 knock sensor provisions and the gen 3 knock sensor provisions...it also has the bosses for thr timing chain dampener

If it was a late 06 it could very well be a hybrid setup...check the block for knock sensor locations..if has both that makes total sense as its a gen 3.5 which would be given relief pistons

 

Lifter trays a dead give away...those are gen 4 lifter trays

 

From what I remember about the Gen 4 stuff, the red circle is the boss for the Gen 4 knock sensor?

If so, I basically have a LQ4 with LY6 (get 4) rods and pistons while still having a 24x engine kind of like the LH6 5.3 that came in the GMC Envoy Denalis?

Damn, I never get lucky on stuff like this. I thought I was buying a Gen 3 LQ4 so this is a nice surprise!

 

Piston CCs must be the same then, LY 9.6 70 cc & LQ 71 cc 9.4
That's a surprise to see 2500 stuff early, they did 1500s in 1999 & 2500s in 2000 but that was a much bigger platform change.

If so, I basically have a LQ4 with LY6 (get 4) rods and pistons while still having a 24x engine kind of like the LH6 5.3 that came in the GMC Envoy Denalis?

Didn't the early aluminum Envoy 5.3s have 706 heads instead of 799s?

 

Pull pan and peek at rods

 

Didn't LQ4s start getting gen 4 rods some time in 2004?

 

Late 04 all motors had the better rods

 

Just saying to lay eyes on what you have, that way no question since so many things are being verified.

 

and the cam sensor is on the back of the valley cover.
[/URL]

Its a late gen 3 (as some call gen 3.5) LQ4 exactly how it was described by the seller. Has floating pin rods and valve reliefs in the pistons as late 04+ did. Cam sensor in rear china wall is dead give away that its not gen 4.

 

My 2004 LQ4 had the cam sensor in the back. it had the good floating rods and the equal length head bolts but a 24x crank.

 

I recently purchased a set of pistons and rods that came out of a 2006 Chevy with a 6.0L LQ4. After reading this thread, I went back and checked mine and sure enough it has the same pistons. I am certain these came from a LQ4 as the vehicle was a 2006 and the heads were cathedral port.

 

LQ4 SBE
0821 LS3 heads with BTR springs
Holley mid-rise carb intake 300-131
230/238 .600/.615 110 CL
Quick fuel 750

Any guesses what that combo should make?

 

You got a weird one there for sure. Lol! Never seen an LQ with those double flycuts but that doesn't mean it didn't happen. They also had us back service some of the older ones that didn't have the coated skirts and floating pins with the later design if they were having cold start piston skirt slapping issues. Doubt that's what you have here since it's an 06, but you could very well run into it.