As far as the air cleaner, I have mixed feelings about what is available. K&N has a standard air filter that replaces the top cover with additional filter. From a functional standpoint, this filter would flow plenty of air, however since it is drawing air from inside the engine compartment, the air is hot, which hurts your power. I've seen taller truck filters that have larger openings, but have not seen them in the after market as an option. You would just have to stumble on one from a bone yard. You may be able to find a high flow after market one made for throttle body. The intake for throttle body is the same as a Q-jet. For mine, I custom made a snorkel from PVC pipe. Not sure this is good to do with a non-port injected engine as a carb has potential to puddle fuel in the intake which can catch fire. A steel air cleaner will survive a flame flash, where plastic may not, depending on the type of plastic. I think the best thing is to just do some internet shopping performance parts and see what kind of ideas you can come up with.
'83 Revcon Prince 31' FWD FMCA F298817
502 w/Howell/GM ECM/Edelbrock MPFI,Thorley's & Magnaflows, 4L85E 4 spd, KoniFSD