Tunnel ram Tuesday!!!...
I got some cheap Mr Gasket 9 inch assemblies and then put some nice 3 inch tall K&N filters. But I have Holley (QF) carbs and the spacing in like 9 5/8ths apart. Carters/Edelbrock are like 6 3/4. Many 12 inch ovals available for that set up. I think your limited carb distance demands small single filters. I "believe" a
bigger oval would be a benefit.