Just for completeness sake / future members that might run into this problem, I first tried the EMPI air cleaner assemblies (easily found through various vendors including here on this Kaddie Shack page I'll be referring to https://shop.kaddieshack.com/K...ng-Hardware_c184.htm). But my engine deck lid wouldn't close. Jeff Lain (@ Kaddie Shack) said he'd never encountered that problem before.
That meant that the Kaddie Shack "Old School" assemblies probably wouldn't fit either (they're slightly shorter). Therefore, I had to go with the Low Profile "Old School" assemblies. See that link above for these.
Importantly, I noticed that my gas fume smell problem still persisted. I suspected that this was because I hadn't oiled the paper filter media. I followed Kaddie Shack's guide tutorial (Kaddie Shack Tech TV: How To Service Dual Carb Air Cleaners https://www.youtube.com/watch?v=XDXqfZALFXA).
In other words, spraying the filters with Johnson & Johnson baby oil and applying vaseline grease to the filter rims (tried to write this in a way to minimize the impending jokes!). That dramatically lowered the fumes. I still smell fumes or other things, but it's probably now the expected/accepted level of smell for these types of cars.