Be careful:
1.)The dash mounted VIN tag is only secured with a couple of "pop rivets",
allowing the VIN Tag & Title to be "transplanted" onto another car.
2.) The door tag is a replaceable tag, and can be modified.
3.) Can you/did you look at the serial number on the engine?
I have never seen or heard of an inner fender panel being re-installed into another car. It's easier & simpler to install a NEW panel (which has no S/N).
It's easier to swap the VIN tag & title (which would agree with the Marti Report data). It is illegal to do so.
Be careful.
Neil Hoppe
Can inner fenders be changed out without ruining the integrity of the car???
Yes. Back in the day, it wasn't that uncommon to "clip" a car if there was serious front end damage in an accident. Look really closely where the inner fenders attach to the firewall on the inside of the engine compartment, and look up under the fenders up and toward the back of the car for welds. I think it was most common to "clip" a car at the firewall, but they also sometimes did it a little farther back.
Other easy things to do:
You can easily remove the scuff plates with a screw driver and look at the top of the inner rockers and see if anything looks funny there (they used to clip cars a foot or so back into the "cab" of the car, so you should see a weld if that was the site).
Get up in the trunk and look on the underside of the package tray--what color is the paint/overspray? Does it match the Marti report?
Get up under the dash--what color is the overspray up in there?
Remove the front kick panels (just a couple of screws) and look at the paint color underneath.
If you can't see anything obvious, and all of the hidden paint matches the Marti report, take it to a body shop that works on old cars and have them look it over and put it up on their lift. If they can find no evidence of the metal work having been done, don't buy the car because the VIN tag and driver's door (or just the door tag) have likely been swapped!!!