I have a 01 single cab with a3.0,at, with about 135k on engine an tranny. I work at an Auto Salvage Yard so parts are plentiful!!!! I was wondering if anyone knew if any parts from another similar motor that will give me a lil more horse power. Im not talking about like 20-30 more. Just enough that I would definitely notice it. I was wondering if the throttle body off a 4.0 would make a difference since it probably has a larger opening for more air. I also heard that the heads off a 3.0 Taurus motor would give me more HP cause of the size of the valve openings!! Any info as to weather any of this will work or help or any orther things I can do to increase HP! I don't race it or anything. I would just like it to be there when I need it. For like pulling out in traffic or passing other cars.. Thanks in advance!!!