Mario, Welcome, I restored a '56 Chevy pickup many years ago, though not as big as the large stores I always loved Jim Carter Truck Parts 1508 E 23rd St, Independence, MO 64055 (800) 872-1913 try web site at Classic Chevy Truck Parts, New, Used Pickup Parts, Jim Carter Truck Parts
I bought tons from him and years ago, he could even set you up with used parts as well (many years ago, don't know today) The guy always amazed me as if I remember he took some sort of memory lessons and memorized all his inventory, pricing, addresses (before computers) and names which is a big plus when your building a old vehicle! Great to have you here!