1998 - 2002 2500's are the same body style and components.
There is no such thing as a 1991 Dodge Diplomat, last year for them was 1989.
1996-2007
1981-1993
This is just a guess but No, everthing changed between those two years.
1993-1995 with the same engine, A Dodge Caravan from the same years will also fit.
Yes, all interior parts are interchangeable from 2002-2008 model years. (With the exception of 2002 heavy duty models).
1973-1987
its impossible i have found out. mainly because dodge diesel's have been terrible for the last, i don't know... 35 years or so. GET A DURAMAX. Its all about Chevy baby.
No, Ford has never used Cummins diesel engines in their trucks. Ford typically uses its own Power Stroke diesel engines in its Super Duty and other truck models. Cummins engines are primarily associated with Dodge Ram trucks, which have featured Cummins engines for many years. Ford's rivalry with Dodge has led to the use of their own proprietary diesel technology instead.
What other years will my 1999 jeep soft top fit!
1995-1997
Cummins owns the engine. Dodge just offers the computer instead of cummins. Cummins is a private company it is not owned by Ford or Dodge.