Pretty sure acquisition of the Engines is all we really need since the Pegasus Class is based on DFRI tech, And the engines are also based on DFRI tech after we remodel them once we get them. And given our heightened priority now that we are about to engage several enemies one after the other in such rapid succession, I think we might need to if Basarin allows it, to make emergency requisitions for dropship engines that we can thus remodel and build the Pegasus class around.
Edit: Heck, If I thought I could get away with it, I would have the Build team building the Pegasus Class Dropship with help from the girls and any of the researchers that might be available.