I recently purchased a driver's side Goodmark fender for my 71 Cuda. I was concerned about how it would fit, but I was pleasantly surprised. I didn't have to adjust or force anything -- it contours with the hood perfectly and the lines are great.
The biggest problem was with the delivery -- I received the fender damaged. If you decide to buy fenders and have them shipped, be absolutely sure to inspect the fenders when they arrive before signing the delivery company's receipt. I had to send the first fender back -- it was damaged pretty severely. Ebody Products (the company I bought the fender from) was incredible and took care of everything for me -- got the damaged fender returned and a new one out to me very quickly at no additional cost to me. The second fender did arrive with a slight ding on the nose cone, but it was nothing that couldn't be easily fixed so I kept the second delivery -- and it fit very well.