Getting back to the original question, the length of the ram has nothing to do pushing power. If you are talking about a 6" to 9" diameter ram, you will have to rebuild your whole contraption because you will be dealing with 56,000 and 127,000 lbs of pressure. When you square the radius, you get up there in a hurry. We have a 100 ton press in our shop and it so big it takes a fork lift to move it and there is nothing on a pickup that requires that kind of press.
