I have been looking for a computer chip for my 2003 ford f150 4.2auto. I have seen one by Jet Performance Chips, and was wondering if anyone knows about them. Or maybe someone knows where I can get one, and which chip is better. I'm new at chips, so I would really appreciate any help. I pull a small trailer 5x8 approx. 1000LB and would like to beef up the performance. Is it worth putting the chip in?