I pulled hair for 3 weeks on this one. Finally got it close enough where I'm more than happy with it. First I set the doors to the rear 1/4. Then the fenders spaced the same to the front of the door as the rear already is. Then, I do the hood. Now i only did it this way, becasue I had off all the panels. if you just take the fenders off, you should not have to alter any other body parts.
Remember, not all nos parts may correctly fit on your e-bod. The guys on the line many times took different parts in order to get that perfect fit.
This was prob the worse thing i had to gruel over on my cuda. Good luck & get a partner. You really need at least 2 people.