ok to set the record strait. An 03 5 speed mach 1 is factory rated at 305hp and 320tq to the motor. It is a dohc 4v v8. It is similar to a 99-01 cobra motor. It has a forged crankshaft. The hp and tq numbers were slightly underated. Ive heard of many dynoing at around 270 hp stock. A few bolt ons put them at 300 rwhp.stock they have 355 gears. weight is 3465 lbs
http://www.mach1registry.com/Specs/Specs.htm