I do not the history of my Simplicity Landlord 101, nor do I know if the duals are factory or home-made. I do know that this is a real climber/puller. Attached are a few photos of me pulling a large culti-mulcher with several hundred pounds of added weight. I have a Long 510, a Ford 8N and a Massey TO-30 but usually they have a mower, box blade, or something hooked on so it is easier to do some things with the Simplicity. I probably shouldn't be able to pull the implement with a 10 HP garden tractor that smokes a little, but it does just fine. I traded a neighbor something for it, and he said it was hard starting. I couldn't get it started at all. I finally took the coil to get it checked and luckily talked to the right person at the dealership. He told me that the coil was good, and my cam was no doubt worn so bad that the points wouldn't close. He then showed me the magic piece -- the electronic replacement for the points/condenser. That, coupled with a new plug, made all the difference in the world. Now it can sit for several days, and still start in a heartbeat.
I also have an old Wheel Horse, but I put it in the back of the barn as it has gone through three coils at $95 each in one season.
Click each picture for a closer view