Not a 1st gen Camaro, but we did this to a 64 Impala we built a few years ago. We welded every panel seam on this car except the actual operating panels (doors, hood, trunk). The front valance was welded to the fenders, the lower splash panel to the fender, the fenders to the front cowl, the fenders to the rockers and the rear quarters to the trunk filler panel etc etc.
Most people dont notice untill you say something.
Welding and body work:
After final prep:
Finished: