I have 71 GS 455 Convertible that needs inner rockers and floor pan replaced. My question is are coupe and convertible full floor pans the same ? I want a full floor pan with inner and outer rockers already attached. I only see that option in chevelles are buick outer rockers different than chevelles ? Also i would like to order the full floor pan that has the under rear seat metal already attached. Is that an option for this car or do i have to order the buick outer rockers seperately ? And a convertible under rear seat pan separately. Thanks.