That's the approach I was settling on--pouring through the crawlspace vents. I too considered maybe working on a raise platform to gravity-boost the pressure.
FWIW, the contractor I used lined the lower few inches of the foundation down over the footer lip with "drain matting". If moisture condensed and ran down the inner foundation wall it would have a small space to continue seeping downward. I suppose a major plumbing leak also would be at least mitigated by this small gap. The matting was anchored directly into the foundation using a hammer drill and manually hammered concrete anchors. I think this product is also referred to as "dimple matting" or "wall drainage". They poured the concrete directly onto 6mil taped plastic right up to the drain mat.
Plan on your house being more humid for the first couple days as the concrete cures. Since they did mine in one shot we awoke the next morning to tropical humidity and rivulets running down all the windows (it was Dec).
I closed up my vents a few weeks after the concrete was poured. I plan to finish encapsulating by lining the foundation walls with sheet insulation.
Best of luck, let us know how it turns out.
