The driver side front floor pan is in the worst shape of them all, and the torque box underneath is just as bad. I am cutting out the bad parts and making new patches out of floor panel scraps. Extra shaping is done with a hammer and sandbag. I got as far as the picture shows before I noticed that the subframe mount on the torque box looks compromised. I am unsure what to do from here. It looks like a simple patch job, but it is also an important structural member. Any advice would be appreciated here. The bottom of the unibody beneath the front fenders has also rusted out. I found a half of a 68 Firebird (literally cut in half with a sawzall from the top of the windshield forward) that may be suitable for patch panels.