Nice project. Keep the pictures comming. Hard to say which model this is. It's definitely a Massey Harris judging by the heat shield above the exhaust manifold. I'd have to see the front sheet metal to say whether it's a FE35 or a MH50 considering your painting the frame gold. I have seen several that where painted more of a bronze or copper color. There are pictures of a Massey Harris 50 with bronze frame with red sheet metal. Good luck to you. -kid