I bought a 1961 C-20 in February, a 235 with a 4-speed on the floor. Was having issues with getting it started. The PO said it ran. So from time to time between myself and a friend would try working on that and interior and exterior work, We finally gave up and started checking internal parts. Starting with pulling the valve cover, low and behold it had two bent rods and one jug had a hole in its piston. Is it possible to either swap it out with a later six or find these parts?