Assuming you get somebody who knows what he's talking about, which wouldn't include the two guys you paged, try asking them about this:
That's one of the column stones in Baalbek Lebanon. The US Army Corps of Engineers and one of its major contractors, Bechtel, have stated that no modern technology, much less any ancient technology, could move that stone. In other words, you could take everything in the US military with wheels, treads, and engines, and chain it ALL to that thing, and it wouldn't budge it an inch.
Attenuated gravity in prehistoric times is the only answer I know of which works.