it looks like we all treat our antique tops the same.
l. don't wash
2. hand quilt
3. use warm and natural batting
4. use the best and highest thread count muslin you can find for the backing. you have a beauty.
i stitched in the ditch on my saved antique quilt top. that way i could 'catch' any spots that needed to be quilted tighter. doesn't look like you will have that prob. congrats on your project.