Matching 45DCOE bodies looking at the stampings although why the ram tubes and filter mismatch?
Possibly these were fitted in a car without enough inner guard clearance for the front carb (which has incorrectly been put in the middle for the photo). Mk 2 Jag has this problem with triples; XK series might as well.
Throttle arm positions and fuel feed are all pretty modular on Webers so I wouldn’t read much into that. There is no throttle linkage and the devil is in the detail as that is going to have to be made, which isn’t always easy, and the cost for the parts is not insubstantial.
I can’t comment on the manifold apart to say that the Webers sit lower than SUs and the manifold looks straight out from the head so it might all fit under the E type bonnet. Stud pattern looks ok.
Final problem is that the whole lot needs to be rebuilt and THEN tuned to your car.
Looks cheap, but to get it running on your car, assuming that the carbies aren’t damaged (air bleed screw is a potential problem) you’re looking at tripling your buy cost minimum.