JFB,
I don't think the engine being out would make a difference on their removal (at least the passenger side)since they aren't straight pieces. I don't see how you would get the curved piece through the 5/8" inch hole in the firewall. I was quite surprised to realize they didn't come out as basically a straight shot through the firewall. The passenger side "doglegs" and actually comes out on a line behind the e-brake.
I think that if I was starting at the beginning of the restoration, I would look to see about running them underneath the car and come up through the floor board, but that ship has sailed.
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