And: What Chufu built was the mmost complicated part at all, the top. If he could finish TIS, he could have buitl the rest too.
So I don't see how this could help
BTW: You should remember, that the great pyramid has only about 20% more transport-volume than the Red Pyramid of Snofru (from which even IAB thinks it was built by a "normal" pharao). And kapheres paramid is, if she has no rock core, the pyramid with the largest transport volume.
(explanation: Chufus pyramid was built over a natural hill which is at least 7 m high (height of the core at the "well") and makes out for about 15-25% of the whole pyramid volume. Stadelman thinks that the floor of the Queens chamber sits on the top of the hill, thus it would account for 45% of the total pyramid volume)