I've got a 170 in my 65 Valiant and currently it has the small 6 inch air cleaner and air filter on it running the original type Holley 1920. I just wanted it to be different so I bought a Cleaner Air Package air cleaner off of EBAY that was said to be for a 66 Valiant with a Slant Six. When I tried it on the throat of my Holley 1920 the baseplate will fit but you have to center it, it's not as snug as the original 6 inch air cleaner baseplate. Also the filter is much large probably 10 inch. If I added the air filter on the baseplate and bolted the cover down there would be a gap between the filter and the baseplate. Now is this correct for a Cleaner air package air cleaner? Because I'm wondering did this actually come off of a 273 2bbl. They didn't claim it to be from a 273 plus it was only $20. The original 170 6 inch air cleaner is tight and restrictive. Is the Cleaner Air Package air cleaner suppose to bring in more air with the gap between the filter and baseplate? Anyone have pics of their originally equipped Slant Six with CAP? Is that all there was for California emissions back in 65?