NICE transformation!
I like those quasi-cruiser kinda funky handlebars. What types of brake (levers) did you put on? They don't look like you salvaged them from the original bike.
My very first post on this forum was to inquire how to secure the TWO front anchoring arms of my Blackburn Al cage (looks a lot like yours) onto the frame, when there are no corresponding braze-ons to anchor them.
A sort-of solution was to buy these 'P'-type clamps, but the geometry is still off (ie, no nice straight-line symmetry with horizontal). The best I could do was to bend the front arms ~ 45 deg down.
A close-up of the front end of your rack would be appreciated: I think you have a later model rack.
The one I put on was new, but ~ 10 years old.