Windoze 7 may not like the post box...............
Drivers side frame rail is shot! Aslo that same side torque box is not there, anymore! We where going to put the floor pan extensions in but after looking at them they didnt fit right. Instead of the lip that welds to the rocker area being bent up it was down. A pain to weld from the underside and the torque box would be in the way. But, this is also beyond by scope of knowledge
Get one of these for $40 and save a couple of hours drilling.http://www.harborfreight.com/air-punch-flange-tool-1110.html