You’ll have to check the bolt pattern on your trailer to know whether this upgrade is possible. The older frames and jacks used a smaller 3 ½” x 4” bolt pattern while the ARK jacks  (standard or ratchet upgrade) both use 5 ¾”x 3 ½”. Aluminum frames can be modified by drilling a couple of extra holes to accept the larger bolt pattern. Most steel frames that came with the older style jack are not compatible with the larger bolt pattern without significant modifications, which we are not able to do at our shop. If you need to make the swap, we recommend reaching out to a trailer/welding/fabrication shop to fabricate a mounting plate that would accommodate the proper bolt pattern, which can then be welded or bolted to the existing tongue to give you a sturdy base to mount a new jack. You should also ask them to add a brace to the back side of the frame to ensure there is sufficient support for the new jack.