I am putting the pass side fender back on my '69. Its original to the car. The wheelwell housing was not removed when I took of the fender, however I do remember some tugging on the fender to get it seperated from the wheelwell housing. To re-install I figured the wheelwell could be loosened up to give more room for the fender to move over the top or I could remove it , install it on the fender and mount it as a unit. What is your experience with similar work?