So im a lil confused ive found a Full floor pan from NPD  thats correct for a 65 mustang they say it fits convertibles and coupes but it doesnt have a flange on the end. I have read on another forum where someone said they had seen a company install a convert floor in a coupe and it fit fine.

This shows the pan with out a flange

https://www.npdlink.com/product/floor-pan-full/100083?backurl=search%2Fproducts%3Fsearch_terms%3DFull%252Bfloor%252Bpan%26top_parent%3D200001%26year%3D


This shows a convertible correct  floor
The flange looks likes its bent up. This surprises me I would think the flange would be bent down. And then the inner rocker would be installed.

https://www.npdlink.com/product/floor-pan-full/100082?backurl=search%2Fproducts%3Fsearch_terms%3DFull%252Bfloor%252Bpan%26top_parent%3D200001%26year%3D

Last edited by True74yamaha (5/25/2021 1:26 AM)

The pictures are the opposite of what they should be.  Coupes need the flange because that is where it attaches to the rocker.   On convertibles, factory, there is an inner rocker that is about 2 1/2" to 3" that accompanies the outer rocker.   Off the car it would resemble a hollow two by four with flanges that spot weld to the outer rocker.  Or vertical plate to use cman term. (I used 2x4 because on an episode of counting cars, there was an actual 2x4 up inside a convertible inner rocker  they restored).    On convertibles, the floor pan is then spot welded to the bottom of the inner rocker.   That is why there is no flange.

I do not know how they claim that could be used on a coupe or a fastback, as there would be nothing for the floor pan to attach to without fabbing up some type of angled flange, shaped like angle iron.    Technically, you could use a coupe floor pan in a convertible though, by either removing the flange, or bending it to face downward.  There is enough of a lip on the bottom of a convertible to do this.   But.....the inner rocker is one of the highest places that rust formed on early convertibles.  Too many shops in the past did this exact thing welding the flange to the lower rocker and ignoring the rust in the inner rocker.  I've seen pictures of quite a few on convertibles for sale on places like eBay.  Then you have to start wondering what they covered up...

Last edited by Greg B (5/26/2021 8:47 AM)

Correct Greg B I would like to find one that has the brake cable channel. I looked on NPD and they say the convertible pan works for all 65s and 66 if someone wanted the difference they state is the their pan has no flange against the rocker.