E Body floor vent dimensions

[viperakon]

Strange request, but I have a restomod car that the cowl area where the floor vent has been sealed up. Want to re install orig one but need to know the dia of the box and size of the flapper. Lots of wiring in the orig area so need to know if I have room to put one back there, might have to move it a little from factory location. Also open to other options to get fresh air in the car?

https://i.ebayimg.com/images/g/G~4AAOSwCTRjlnQX/s-l500.jpg

 

[heminut]

I don't have the dimensions but you should know that the hole for the vent had a flange around it that was 1" to 1 & 1/2" high. that was there to keep water from coming in the vent if it got into the cowl area (rain).

 

[fasjac]

Here’s some pics of one I had in the shop.
The part# is 2936644 also, has 68579 under the part#.
Might help?

 

[340challconvert]

Pics of the cowl vent lip;
2nd pic of my car after priming/rust proofing.

 

[viperakon]

Thanks a lot guys this really helps!!