Swapping or installing a new all glass body is a simple task.  You can use an original frame or one of those provided by the numerous chassis suppliers.  Our bodies are all manufactured close to factory specs - including wheel base - so ordering a chassis is simple.  Once your frame or chassis is bare, set the new body in position and weld your perches off of the frame. (Under rocker panel - tail panel & firewall locations.)   You may want to weld a couple of pads off of your roll cage in the trunk, door jam & window areas.  Before trimming out the blanked in front and rear windows, you can leave a small corner section of the window blank for additional mounting areas.   Note: You MUST hang the doors when you mount the body to insure correct rocker placement. These locations are well hidden  - so after a proper installation - your light weight body should look like original steel.  You will see that once you lower your original body into place - just how simple and quick a professional installation can be.  If your attitude is anything like ours you'll never think of running a floppy sheet metal shell again.