What's it worth?

Here's what I was thinkin. My wife wants a duster too so what I was thinkin is buy that 340 car and using that one as mine and build the one I have for my wife. Since the 340 has the tag n mine don't I'm thinking bout takin the scoops, the entire drivetrain and the sharktooth from mine n puttin it in the 340 car since then for my wife's car (the 318 duster) I'd put in an 8.8 rear, 5.9 and OD. I'd run the 318 from the nc duster in the 340 duster till I get a 340 to put in it.