Just bought a 5.7 for my Duster

Looks like you have a 5.7 Hemi out of a Truck or Durango from 2003 to 2005 since you have the plug wires that fire across the motor. Basically the coils fired in a wasted spark setup firing both a plug on the compression stroke and the opposite piston on the exhaust stroke.

In 2006 they did away with the extra wires and used a single coil to fire both plugs in the head at the same time.

The intake is clearly the one used on the Truck and Dugango motors. The Jeep Cherokee uses the car style intake.

Hope this helps,

Regards,

Joe Dokes