The H-1 is round. I have seen dual quad T'birds with either round or oval air cleaners. The round one is different from the passenger H-1 though. I haven't come across your setup before. Looks pretty cool, though!

UPDATE: I got this sorted on another forum. Turns out I inherited some bad wiring and no wires should be going along the top radiator support on a '57. PO had routed the headlight and park light wires there when they should go along the nose panel. 

Is the H-1 the oval?
 I have dual quads on my 56; it’s a copy of the over-the-parts counter law enforcement kit with an original red  Purolator NASCAR mandated one. I believe the civilian and law enforcement kit came with an oval one. On a T-bird site a member had found information that there were only 103 kits made. I’ve seen photos of the kit but it had the Purolator air cleaner. Dit the E Code 57 car come with the round like I’ve seen on 57 T-Birds or oval . . . . I’m just wondering.Thanks


56 Vic, B'Ville 200 MPH Club Member, So Cal.

Thank you for the info. I have the OEM air cleaner with the H-1 stamping.

56 went in front of the radiator support. What air cleaner do you have on your dq’s??

56 Vic, B'Ville 200 MPH Club Member, So Cal.

Thanks for having me in the group. I have a '57 500 Club Sedan with dual quad 312 and a question on original Ford wiring. For the wires that run along the radiator support, do they belong on the radiator side or horn side? Looks like the stock clips could go on either way. TIA