No.
It is on the back of the engine, next to the distributor.
No
They are the same from 1994 to 2002.
No the 1999 and 2002 1500's are different body styles.
it should be on the intake
It can vary from 8 mpg to 15 mpg
The valves on a 1999 Dodge Ram 5.2L are not adjustable.
I have never heard of a mixer on a dodge truck.
No
eBay
Yes but the gears have to be changed