Laying a "strip" in 3rd doesnt mean anything. Its not a measure of horsepower but a measurable lack of traction. I dont quit understand what your wanting us to say. Truck has a stock turbo, maybe has a 215 pump but maybe not. Not sure of the timing or the injectors. Fuel plate is slide forward and has 4" exh. Maybe somebody moved the timing up and thats why it doesnt spool till 2000. You can only get so much out of a hx35. Maybe it has a small set of injectors, maybe not. Your butt dyno doesnt really read correct when you havent road in anything thats really badazz. What does your first gen make for power? I ride in a 500hp 01 that will lay marks in all 6 gears but it doesnt mean anything when talking hp numbers. Ive rode in a few stock trucks that ive bumped timing on that i was like hmmm interesting ride, others have been pigs. Im betting it still a bone stock truck. With out proof something has been done other then "it destroys my 1st gen", there is no way of knowing and thats not to say your 1st gen is tuned to its full potential.