US Car Tool Subframe Connectors

Thanks for the info guys and the pics Boxer. The floors are not welded in solid yet, but will be. I should have them finished tomorrow and will be able to spend more time on the connectors then and get a final fit. Hopefully all will be well once the floors are finished. How far back do you allows the connectors to overlap the rear frame rails, do you trim them shorter at all or leave them full length? Thanks again.