Sorry, it's now published at https://www.shacksonracks.com/demolition-map
I was able to play around and found a semi-workable solution with this:
#map {
position: absolute;
top: 0;
bottom: 0;
width: 100%;
height: 650px;
}
But it still doesn't seem to change the size of the content box. Had to turn off the social links (seen at bottom right of the screenshot in the above post) because they were visible through the map, and any text content blocks I tried making to show below the map just ended up behind the map and slightly visible through it.