my dodge is a 2000 2500 360 5spd 4x4.power drops off and pops thru throttle body

sounds like a clogged cat converter. If you can disconnect exhaust before the converter and test drive to see if it still acts up the same way. This will cause the check engine light to come on due to it being disconnected. Setting several codes.

SOUNDS LIKE THE TIMING IS OFF .AS A MATTER OF FACT IT IS RESET THE TIMING