Before you even think about removing the inner fender, you need to take a couple of measurements. Take a measurement from a point on the cowl to another point on the radiator support. Another measurement is to measure from the passenger-side inner fender panel to the driver-side inner panel in a couple different locations. This measurement should repeat itself when you install the new panel, but it's better to be safe than sorry. When you install the new inner fender, make sure the measurements are the same before you do any welding.