Certain trailer items like scissor jacks are not trailer/motorhome-specific. In order to choose scissor jacks that will work well on your 1974 Travco Motorhome, you will just want to make sure you choose a set with the needed weight capacity, along with the proper jack height. You will want to make sure you don't lose any ground clearance by selecting a jack that extends further down when retracted. I recommend noting the weight capacity on your existing jack along with its height in order... view full answer...