1987 Buick Grand National

It only takes a matter of minutes to cut the outer edge of the frame with a plasma cutter. The front of the frame notch begins directly inboard to the framerail, from the lowest forward opening of the wheelwell. It proceeds back to the rear of the framerail, 2 inches in front of the body-to-frame bushing. He cut out the outside of the frame and removed it before cutting inboard approximately .5- to .75-inch of the top and bottom of the frame. Cotton's uses the top and bottom from the middle of the frame as a guide to narrow the 'rail. In other words, they don't remove .5-inch front to back as the frame is of different thicknesses. Whatever the depth is, it needs to continue front to back.

1987 Buick Grand National Upgrades - 10-Second TR

It only takes a matter of minutes to cut the outer edge of the frame with a plasma cutter. The front of the frame notch begins directly inboard to the framerail, from the lowest forward opening of the wheelwell. It proceeds back to the rear of the framerail, 2 inches in front of the body-to-frame bushing. He cut out the outside of the frame and removed it before cutting inboard approximately .5- to .75-inch of the top and bottom of the frame. Cotton's uses the top and bottom from the middle of the frame as a guide to narrow the 'rail. In other words, they don't remove .5-inch front to back as the frame is of different thicknesses. Whatever the depth is, it needs to continue front to back. View Related Article

1987 Buick Grand National

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