I purchased the three-finger economy model from Amazon plus three more fingers so as to have a five-finger puller.
It does fit the 64 tapered 8-3/4 rear quite fine with all five fingers. But, it don't just jump right on to the axle shaft either. PROPER installation is in order.
I snug it up to about fifty ft pounds and tap/hit the end of it with a 5-pound hand male hammer.
It works like new money.
There definitely is the opportunity to damage the end of the axle shaft if a person doesn't install the tool diligently. Leave the "ends" of the threads on the axle shaft captive by the big nut so they can't mushroom.
For those people thinking about abandoning the tapered shaft axles all together, you might think on that a while before you do that. The tapered shaft setup is a completely captive arrangement, The hub CAN NOT come off the axle when driving the car as long as that "big nut" and the "little bearing retainer plate nuts" stay on the car. The one-piece axle can and has been known to slid right on out of the axle housing tube while the car is being driven. Axle shaft, drum, wheel, tire...gone, the whole buffalo. Everything but the bearing retainer collar, bearing and retainer plate. Bouncing down the road end over end. With NO warning.
At least that's how it went for me. A very entertaining event.