Can any one point me to a source that describes what body parts from other year Z's are interchangeable with my 1972? I've noticed that a number of aftermarket places simply list fenders, doors, hoods, etc as for 70 - 78. Does this mean all parts will interchange between these years? My doors are completly rusted out on the bottom and a friend has several 280's from different years and has offered to sell me parts off them if they will work. Thanks.

Nearly all the body parts are interchangeable. However, even though the doors do fit, you will find that the later 280's had a different door latch mechanism.

There are patch panels available from MSA for about 35 bucks each, but you will need to have them installed by someone that is a good welder and body person if you can't do them yourself.