I just purchased a good running 2001 6.0 for my 2001 Silverado w/4.8. I drive this truck 5 days a week 80 miles round trip to work. My question is what can I do to the 6.0 to increase performance and not take a huge hit on driveability or gas mileage. It is a LQ4 engine. I can do any of the work myself but just don't have any experience with the LS Series engines. Can you shave the heads to get to the LQ9 compression and is it worth it? Would a stock Z06 cam and springs be a good choice? I have read that shorty headers on these engines is a waste of time. Is that the case? My truck has 3.08 gearing. The trans has a stock converter. I just don't want to reinvent the wheel here so if you have some good experience with what I am looking to do please let me know. Thanks Keith.