Yes EMORRIS548 you are right. Infact mine is one of the first 4.5s built. Build date of 4 jan.2004. I ordered it the week before and took delivery the 3rd of feb. I tow a combined weight of 19,000# with a pure stock one and have no desire for more. Two years ago I pulled from moab, UT to indy. on I-70 with no problems including vail pass and others. I have over 15,000 miles towing on my truck and just did my first brake job at 91,000 miles. I consider that darn good. If they would do it I might go 20 miles and let cummins factory put in a 6.7 straight trade. I don't think that will happen so I will be very happy with what i have since I ordered it for me to my specs. Thanks for your input thought.
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