I have not posted much on here as of late but I need to ask for your "expert" opinions. I recently took my engine apart to diagnose a valve train noise which turned out to be multiple worn lobes on my custom Patrick G Comp Cam (specs in signature). To make a long story short, I lost oil pressure for 5-10 seconds and this was the result.

Anyways, I am going to replace as opposed to fix because I do not know the extent of the damage and the 5.3 has 122K on it. The engine is out and I am waiting to purchase a replacement.

Now my dilemma: I have found a 23,000 mile LS1 from a 2004 GTO and a zero mile (yes, zero) LQ4 from a 2005 Silverado HD. Both are around the same price at $1600 a piece. I have all the modifications in my signature and have already purchased an EPS cam from Geoff Skinner with specs of 222/226 .597"/.598" on 112+4. I feel the cam will compliment either engine.

What I am asking for is your opinion on which engine I should go for and why. Thanks for your help!

 

Use the 6.0....and tell me where I can find the LS1 for $1600

Id go with the aluminum block engine for the weight, but since you have the extra mass of a 4x4 it would be better to go with the 6L in my opinion.

 

LQ4, better intake, more cubes.

peace
Hog

 

1600 a piece???? buy em both at the price!!!!
LQ4 is the way to go and if you dont pull the trigger I'm sure tons of people on here would scoop them up in a heartbeat.

 

no replacement for displacement.

 

When I bought my 99K mile LQ4 for only $900, I also had a LS1 AND Harness in front of me for $1,100.

Foskey's Auto parts in South GA baby!

I found mine by searching on Car-Part.com--Used Auto Parts Market Happened to find them both at a local yard in my town.