Where to start restoration?

Hello guy's and gals.I bought this 78 trans am cheap and want to restore it the best i can?Here's some info I have the build sheet,pontiac order form and even the blue instrution tag on how to operate the hazzard button?it is mayon red,black standard int,power win,A/C,rr defrost,ws4,cruise c,and rally 2's.everything is intact everthing!I know the motor will need rebuilt so I will pull it and do a stock rebuild not a problem since I rebuilt the motor in my other show 80 trans am.It also is a # matching 6.6 YA 400/350th,2.56 posi.Car has a few rust holes,in the rr seat belt area and rocker on pass side,and where the emergancy cable goes into the floor!What kinda material should i use that is flexable to get these bends?All int is intact to so I don't want to strip the whole car then I mite loose pce's?It don't have to be a show car As i already have one rather a nice tribute to the way this T/A was as new  with some miles on it it has 101 thow and some change I guess I would like to leave the grease to!Anybody have any ideas where I should start!Thanks fellow pontiac fans!P.S My other T/A is peiced together from other yrs.I've never owned a complete origanal ***