I've been doing some research on LCA's lately and I've come across many posts w/ the spinning bolt issue. If you do a search, you should be able to find the fix. I believe it has something to do with slats in the floor that you can cut and gain access to the nut that the bolt threads into. Hope that helps.

1999 Contour SVT #1966/2760, Silver Frost/Midnight Blue Koni Kit, Mille Miglia MM-S rims, B&M shifter, Stazi mesh, SFCs, optimized Y-pipe & TB, SS break lines, K&N drop-in, Infinity Kappa speakers, MTX amp/sub