Termites and Bowties- Early Chevy Group

Please look at these pics to understand my question.
I need your wisdom. I just don’t understand what holds onto the body of my coupe at the areas that are outside the chassis and subframe.
I have a subframe laying on top of my chassis and I made it the same thickness as the original wood floor beams the were nailed to the rocker at the door threshold. The top edge of the rocker lines up nicely with the top surface of the subframe. The lower edge of the body follows the same bead as the lower edge of the rocker. I know I have my rocker pieces lined up correctly.
So what connects to the body flange shown in the pictures? I’m guessing that maybe a vertical piece of wood was nailed to the underside of the wood floor beams (subframe) and it extended down to that body flange, but that’s just a guess. The flange shown in the pics is at least 4” below the top chassis flange. A similar flange exists on the lower body just in front of the rocker. Help!

 

I have a pair of rear 34 Standard sedan fenders. Haven't handled them for several years but as I remember they were pretty decent. They need to go to someone that can use them. Be glad to get some photos to anyone interested.

 

I suspect your right about a second piece of Wood to fill the gap. I'll get into my build photos and see if I have anything that will help you out. I'm guessing I just folded up a piece that would do the job and moved on.

 

Those would have been tacked to the main sills. So there was more wood that may not have been in with yours when you got it.
This may help:
https://forums.aaca.org/topic/164305-reconstruction-of-a-34-chevy-master-coupe/
you may want to try searching main sills for your car to see exactly what they would’ve looked like. Although, they should be fairly similar to the picture @31chevymike posted of his:

 

After looking through a lot of photos it looks like the actual pieces for that job I folded up didn't get photographed. I do remember making it now. In the photo below, if you enlarge it you can see the same flange on the bottom of the quarter and I remember there being nail holes in the flange also. Also notice it hangs well below the Sub Rail like yours. The nail holes are a tell tail that it was nailed to wood.

I do not have a photo without the upholstery card in place but in this photo, you can see there is nothing to support the bottom edge of the upholstery card.

In this photo the cleko is a giveaway there is a check to support the bottom edge of the upholstery card. You can also see some heat marks from rosette welds. It was a little involved but easy to make, all strait folds. I cut a piece the width I needed and a little longer top to bottom than needed. I started with a 1" 90 degree fold. That 1" would sit on the top of the floor pan and be welded in place once done. I then went up from the 90 degree 2" and folded a fill 180 degree. On the edge mating to the B Post I folded a 1/2" flange to butt against the post. I trimmed the bottom edge to stop at the quarter flange and extra dropping through and past the bottom edge. Then I scribed a line matching the Quarter flange and removed the part. Next was fold a 1/2" flange to sit on top of the flange with all the nail holes. Now the 2 opposing 90 degree flanges just sit on top of both quarter flange and floor pan, Weld it up and a little body seem sealer. Done, one part doing 2 jobs.