Before the old quarter comes off, it's nearly impossible to know what parts you will need. To be safe, plan on replacing wheelhouses and trunk extensions before you begin. You don't want to sit around waiting for parts, so you need to plan ahead. You might find that the car is worse than you thought. It may need inner wheelhousings, a rear tail panel, rockers, a trunk lid, a deck filler panel, a trunk floor, and trunk braces. Here, the trunk drop-off will need renewing before the new quarter goes on.