The problem your having sounds like rust out in the shock tower at the lower frame rail. The tower is most likely separating from the rail as this is very common on cars in the rust belt areas of the country. I would inspect that area first on each side. Some models have heavy layers of seam sealer and accumulated dirt you will have to dig out to get a good look at it. If the tower and rail is rusted out there are a couple options: patch repair with some of the available aftermarket patch kits, replace the apron or rail assy. if its really bad or repair one and replace the other. If the damage is extensive I would try to find a nice original rust free tower and rail section and use what you need. You will then have a correct part for the car and a solid repair. If the shock towers are leaning in from a collision or unknown reason, I would find a FORD export brace and this will be your fixture of sorts for the upper tower to cowl measurement and you can use a porta power or friction jack to get the proper alignment and when your export brace bolts drop in easily your good to go. If you have access to a tram bar to double check your work and also make sure your entire front unibody structure is square, this can also be done with a tape measure, just make a x measurement from the furthest front fender bolt hole to the furthest rear fender bolt. Hope this helps.....CHRIS