I am getting ready to replace my fenders on my '69 SS. I don't know if fiberglass or repro's would be best. Any suggestions?

For an all-out race car, in a class that allows glass fenders, they're good. An entire glass front end would be better....If you run glass fenders, you'll have to run a lift-off glass hood as well because you can't bolt the hood hinges to the fenders. They'll never look good on a street car. It will take ALOT of work to make them fit and to get all of the headlight trim to fit and attach. I'd stick with good used metal fenders if it's a driver.