Use lots of clamps. Lowes here had a bag of assorted sized plastic clamps when I did my 69 RR. I bought 2 bags and used almost all of them at one point. Didn't have any wrinkles though! Take your time and it will turn out great!

72 Demon 340
71 Duster 340 Resto https://board.moparts.org/ubbthreads/show...part=1&vc=1