If you are serious locate the company that did conversions. They no longer do so might release information. I saw a couple sold off on ebay a few years ago. They had structual sub frame connectors and some general supports engineered into the body structure I thought. Coupes only as four doors would be weak without the additional supports and no place to put them. But then again I guess one could weld the doors shut and use a can opener to off the roof.. Do not forget to engineer in a sump pump for those rainy days. That last post is rediculous. Must be vegas.