I could do 720x368, but then there would definitely be more lost into the overscan than Moth3r's original (and possibly the laserdisc depending on how his capture card worked).
Additionally that would only be true for ANH since for Empire and Jedi the left/right borders are 4 lines. So then you'd be talking a 4 horizontal line gain and having slight different resolutions for the movies.

If I re-encode to fix a few problems I saw, I'll consider it. But, how much can you really gain since the source laser disc had a lot less lines than I do now.