We wiped some body filler over the seam so the repair will be undetectable once installed.
Here is a list of the parts that you will need to accomplish this project on your own. Notice that all of these parts can be found at your local parts store, making it possible to acquire the necessary materials fairly easily.
Visit mrbuick.com for Buick specific parts, such as the core support replacement we installed here.
| Parts | Source | PN | Price |
| '70-'72 Buick core support | High Torque Racing | Rebuild kit | $125 per kit per side |
| PPG DF705 body filler, 1 qt. | The Paint Place | DF705qt | $9.85 |
| 120-grit sandpaper, 1 sheet | The Paint Place | | 0.50 |
| PPG DP90 epoxy primer, 1 qt. | The Paint Place | DP90qt | 34.95 |
| Weld-Thru primer, 1 can | The Paint Place | | 8.95 |
| PPG seam sealer, 1 tube | The Paint Place | | 14.95 |
| Tools |
| Spot-weld cutter bits, 3 pack | The Paint Place | | 7.95 |
| 3-inch cut-off wheel | The Paint Place | | 1.95 |
| Matco wire-feed MIG welder | Matco truck | | 875.00 |
| Matco die-grinder | Matco Truck | | 89.95 |
| Craftsman corded drill | Sears | | 99.95 |
| Labor |
| 2 hours labor | Ramsey Auto Body | | 60.00 |
| Total | $1,204.00 |
We used a DA-sander to level the filler and feather the edges using a 20-grit pad. | 
For the backside, we ran a bead of seam-sealer to fill the pinholes and keep moisture out, preventing future problems. |
A little PPG DP90 epoxy primer completed the repair with a smooth, flat finish that is going to look good under the flat-black engine-compartment treatment we're going to do next. | |