Where does one find an oval air cleaner for a 340 that's not a 6 pack?
MoparDave at Roseville Moparts is a member here.
http://www.rosevillemoparts.com/The Original Mopar 440 4bbl AC is the same as the 340 4bbl AC but I have found that the reproductions from PG Classics are not exact reproductions... They are the only ones making these as far as I know. You can find originals on EBay but you will pay $$$
I had to cut it down to fit. I cut about 3/4"-1" off the throat and cut out some of the top bar with the studs for the lid to clearance the air horns and butterfly.
1/2 day at most... Rotozip!
Full disclosure, I am running a QF carb and LD340 intake so it could be taller than stock intake and carb...
Don't get the 383 4bbl version.
The 383 4bbl version is even taller because the 383 is shorter than the 340 and 440.