Try your local used auto parts salvage yards.
E-Bay? Craig's list? Salvage Yard?
My 98 Ram sport does it is a control module behind the dash if your does not and can be installed quick at the dealer .
NoNo
No. Different body styles.
no it wont you have to have either a 98 or a 99 dodge ram transmission
A 1998 Dodge Ram does not have EGR.
No.
Fuel injected or Carb?
Yes, if it's the same model (1500, 2500, etc.).
200,000-300,000
9.25 inch axle
Dot 3