I just need the Quadrajet sized opening. I think that's around 5". Here's a thread on another forum with pictures. https://forums.aaca.org/topic/337474-wtb-1966-q-jet-air-cleaner/
Hi. I have this 66 QJ air cleaner. Dirty, no rot, minor surface scumm, a good media blasting and paint..it could be nice. Make you a deaaaal!! Wheelz, Tampa Bay