dropping down

Thinking of removing my engine, 70 Duster 340/a833 to clean up the engine compartment this winter. Thinking of lowering the k frame instead of lifting it out. Three questions:

How much does engine/tranny/kframe weigh? Will a hoist hooked onto a carb lift plate hold it? RPM air gap, will the studs hold in the aluminum manifold or do I need to worry about them pulling out or breaking?

Will a dolly made of doubled up 2x4's hold it to wheel it out from under the car?

What do you hook the hoist up to on the car to lift it once the k frame is on the dolly?

Thanks