I wanted to build a gantry to hold a chain hoist for stuff like this, but then I realized I don't have a garage or even a paved driveway. so what I've been thinking about is buying a beat up used trailer or just a trailer axle, and building one onto a trailer axle with an I beam sticking out 6' off the back with a 2" hitch on the front so I could hitch it onto a truck for weight, and then pull the cab (or motor or whatever) up with the chain hoist and use a trolly to slide it back and center the weight over the axle. If I did this, then I could move cabs and engines and stuff way easier since I have a couple different trucks in a couple different places. It would be a good winter project. We'll see!