Tell her all of it. But seriously most of it will match up. You will find the newer version has a bunch more smog items on it but overall it all should work together. You will find the 89 has a 360 v8 and some other goodies. It is in the same class as the final Grand (91) in terms of parts. There is a few sheet metal changes but hey are small and most noticeable will be the grill and the hood ornament and hood. Other than that you will find most parts interchange and the newer parts (interior specially) may be much more comfortable than the 79 parts.
The Final Salute
EVERYBODY is pro-gun, some just don't know it. When an anti-gun person is in trouble, the first thing they do is call 911 and demand that they send somebody with a gun!
We've idiot proofed the world... now its full of idiots. - Spiritof76
You will truly be the same today as you will be five years from now, except for two things, the people you meet and the books you read. Charles E. Jones
I think I'll add some memorable quotes. blah blah blah..... FPKites
Trying to understand some people, is like trying to pick up a turd by the clean side.