70's nova cable will work and is avalable. GM Parts Direct still sells the cable p/n 3998632 and im sure you can round up a pedal at a local scrap yard. If not you can call Bob at Camaro Specialties and he will definitly have one in stock and will probably ship to you as well. Hes in Aroura NY. His wesite is
http://www.camaros.com. If your anywhere close its worth the drive to see what this guy has. Its rediculous. Everyone says 12 Bolts and Muncies are hard to find....this guy has walls full of them...LOL
Hope this helps.