Question about carbs for tunnel rams

I have a question that's probably going to sound stupid but here goes....
As you can see from pics, i'm running velocity stack air filters, but i want to run these like in the pic below >>> 20190310_105219.jpg
But my problem is these are 9 inch diameter and from what i can tell, they wont fit as thay are slightly too large. The stacks are 8.75 inch diameter see pics >>> 79169412_535072110412141_6415820987123630080_n.jpg 80011276_1719511361506739_7288364763199832064_n.jpg
As you can see, i have sat a 9 inch top on one of the stacks and the difference is visible. Anyone have any suggestions as to why it wont work on mine? I would have thought all tunnel ram tops would have the same centre point to point (centre of carbs). Thanks in advance.