Hi,
I'm planning a "lift" soon, too. And, I'd like to rig something for repeated future use, that one person can handle so as not to need to rely on locating 4 to 6 helpers.
I've been looking at chain hoist, possibly from Harbor Freight. It occurs to me that these would also be useful also for lifting the motor/gearbox into the car, although not as mobile as a standard engine hoist. (Move the car under the chain hoist, instead of moving the engine hoist to the car.)
I was planning on using two, but this mainly is because of concerns about the the ceiling to which the hoist will be attaching, not the hoist's lifting capability. I'll be bolting to floor joists above the garage, which have a bit of a span, and two separate hoists will distribute the load better on those.
For anchoring points, I'll make a couple from heavy angle iron and install them with as many big lag bolts as I can. This garage is finish/sheetrocked and insulated, so I will have to bolt from below, although I'd prefer to bolt into the side of a joist or truss for this sort of thing.
I also considered using block & tackle with heavy rope, four instead of two. If the body were being lifted only very briefly and immediately set back down on something, I think this would be safe. However, my car is a bit less disassembled than yours so is heavier, and I may need to leave the body hanging for a few days and, briefly, work under it.
I looked at Northern Tools website and found "2000 lb." block and tackle setups, with 1/4" rope! I *don't* recommmend those! No way 1/4" rope would be adequate!
Another option if not lifting too far, use an engine hoist at one end, a ceiling mounted chain hoist or two rope block & tackles at the other.
Or, if not lifting far, it might be possible with two large engine hoists, although I'd be careful doing this with both on wheels.
The attachment points on the car, as suggested in the TR4 factory manual: The hood hinge mounts (front/inner wheel arch) at the front. The seat belt anchors at the rear. I have a roll bar in the car, so will be using that at the rear.
These car bodies weigh less than we tend to think and really aren't hard to remove. Still, it's better to be overly cautious about this sort of thing. If I were doing a lot of this sort of lifting, I think I'd set up a redundant strap system as a safety precaution. And, if I were permanently in this garage, I'd make an A-frame gantry to better support the hoists.
Cheers!
Alan