Kelly I know this is probably not what you want to hear,but I would not recomend building your own ROPS. They are designed to take the entire weight of the tractor rolling onto them without failing. If you are a master welder & fabricator maybe,even then this is something you are counting on with your life. I know the cost of a ROPS is high but there were quite a few 4020's that had them,so you may be able to find a good one in a tractor scrap yard for a reasonable amount. The little Ford I'm not sure on. I know Tractor Supply used to sell them. There is another web site called Yesterdays Tractors that has boards like this one for each brand of tractors. I would suggest trying the Ford board there to see what those guys say. Good Luck.