Look in the fender wells for any overspray where its been repainted. Also look on the inside of the drivers side door sill and compare any info there (such as engine size etc) to what is in the car. Look for the sticker in the engine bay that tells how to route the serpentine belt and it should have some more info about the engine. The engine code should be on the block where you can see it. You'll brobably have to wipe it off to read it. If the dorr doesnt align right then the frame rails are probably bent. Also look for rust as that can be a sign of major damge that wasnt repaired properly.