I test drove a 04 chevy today that had the LB7 in it. It seemed to run perfectly fine but it just felt like something was holding it back. Right after I tested it I drove my buddies 04 with the LLY and it just seemed to be way more respsonive and just had more grunt. The LB7 truck was completely stock and my buddies LLY was also stock but had 35 inch tires. Did the LB7s always feel a little held back or was it just not running right?