I am very interested in purchasing a Doublecab SR5, 4.7, 4X2. I began to take interest in the TRD package, but soon found that I really like the sport package. I noticed that when I "build" the truck online, the sport package says "delete tow =6700". Does the sport package not include a frame hitch, heavy duty altenator and the wiring for the trailer? Thanks for any info. Going to possibly buy on Saturday!!!!