If you're serious about this car, I would suggest that you request one of the club members living in MN to do a Pre-Purchase Inspection before you lay down any money. Rust in several places is always a concern and should be checked before any purchase.
The raised letter panels are an aftermarket item and can easily be replaced with either factort steel panels or similar FiberGlass or ABS plastec panels. You just need to drill out about 7 rivets on the door sills or remove an equal number of screws, depending on how the panels were secured. There are also severalscrews beneathh the rocker panels and one in each wheel well.
What are you looking for to replace the panels with? I have a set of gloss black ABS rocker panels that I no longer need since I'm having flares added to my 72. Could do an out right trade if you're interested, if you decide tobuy the car.