K&N makes an air filter like that, it's a regular base, a filter and a top made out of filter material. The more I read about K&N, the more I wouldn't buy one as they don't seem to filter that well. I'm kicking around an Amsoil, they filter AND have high airflow.
Your desribing an open element filter. have the stock[ugly blue] air cleaner housing on my 289., but I purchased an chrome open air cleaner[the hi-po 289], which is nice, and gives better air flow. Do'nt throw that ugly blue on away though, I don't think they are rare, but definatly worth keeping. Mine was blasted and painted, ti looks pretty nice, and has the working snorkel, can someone explain exactly how that works???
Yep I bought the k code style open element air cleaner from some mustang vendor, cant remember which, but most vendors sell them. I bought it because I wanted the chrome open element, but its a little more authetic then a holley brand or something else. then i added a K&n filter.
how the snorkel works... i think
when its cold it uses the warm air off the exhaust manifold to help heat the carburetor for faster cold starts, once it heats up enough the flap (or trap door if you will) closes off the manifold heated air and just sucks out the end of the snorkel, for fresher air.