Yea, what you are showing is or was the lower portion of the firewall, floor pan and the umm, torque boxes. Surprisingly the trans mount and frame rail extensions look to be in fairly good condition,...go figure, must have been protected with oil from a leaky engine. IMO if the floors look this bad, the rear quarters, wells, rear torque boxes and rear frame rails,....are not far behind in,...let's call it DISTRESS!!!! It can be fixed,....just time and money. Oh, the rear quarter panels, are not available in reproduction for '67-'68 and there's a lot of these cars in the "restoration stage" trying to find good quarters.