Oval air cleaner measurements?

Big block and small block six packs are the same.
However from my own research it appears the top photo is the two four lid and the bottom is a six pack lid.I dont have the measurements of the two four but can get the six pack,but as you can see by the pics the six pack rear carb is all the way back almost to the rim where the two four carbs are centered.I dont think they will interchange.There is also a single four barrel oval breather.
Here is a complete list of all the mopar air cleaners
http://www.nicksgarage.com/aircleaner.htm