Cranks
All cranks are cast. They will support 1100 hp.
2002-2005 cranks are fully counter weighted. 7 timing notches
2005 SERVICE cranks are cross drilled - rare part. Also the best crank. 7 timing notches
2006 - 2007 reduced counterweights, cross drilled 7 timing notches
2008 - end of production, reduced counterweights cross drilled 58 timing notches
Personal experience - the 06 up cranks are hard on rod bearings due to dynamic loading especially if your running performance parts.
I've been watching Craigslist and Ebay for several years. I've seen quite a number of the 06 and newer with spun rod bearings. I have an 08 in the shed that has had the rod bearings beat out of it. GM changed the oil filter specifications for these motors in 06 also, They stopped using filters with anti-backflow valves. I wonder if they were trying to get a little more oil volume. Anyhow, I've seen quite a number of 02-05 models with 200-300,000 miles on them and still kicking. I personally have an 04 with 225,000 and it still runs as strong as ever.
With all that said, I'm thinking the 02-05 equipped with the later head is the best combination to be had. I know you lose the oil squirters, but it seems you enhance the lower end durability.
Chris.
