Transplanting Large Old Lilac Bushes?

When we moved here a year ago, a structural engineer said the 4 large old lilac bushes are too close to the foundation of the house and are causing problems. All are at least 10 ft high. One has so many shoots it is about 4 ft wide at ground level. We cut it back severely (to about 3 ft) a year ago and it shot up like mad all summer, but no blooms of course.

Two are very scraggly and only had a few purple blooms. I pruned them this fall. The 4th one bloomed a little better, but is much taller, reaching over the eaves and is a lot less scraggly, but also didn't bloom much.

Can we transplant any of them with success? I hate to sacrifice these mature bushes, but wonder if any of them actually have a chance at relocation? Please help.

By Wilson