66-70 floor pan supports for bucket seats.

[Kern Dog]

Bench seat cars relied on the brackets in the floor that all these cars seem to have. They attach to the rocker panels and follow the floor pan.
Bucket seat cars had additional reinforcements in the floor to support the inner seat tracks of the bucket seats, those were in the floor nearest the transmission tunnel.
I got these reproductions from
AMD:

Four plates that are all slightly different.
Two questions:
1) Do these lay atop the floor pan on the inside or from underneath?
2) Who has the measurements on where to place them?

I bought these for Jigsaw…

But since I’m not ready to dig into the car right now, I might put them in the Plymouth …

I can buy a replacement set for Jigsaw.
Can you tell me where each one goes?
1)

2)

3)

4)

Thanks guys!

 

[davek]

Greg factory bucket 69 roadrunner hope someone can give measurements.

 

[Kern Dog]

Thank you! Knowing that they are attached inside may be all I need.
The car has bucket seats now. Maybe I can just lay them down where the seat mounting holes line up.

 

[PurpleBeeper]

Thank you! Knowing that they are attached inside may be all I need.
The car has bucket seats now. Maybe I can just lay them down where the seat mounting holes line up.

That makes sense...and use the seat tracks to line it all up?

 

[Kern Dog]

I may attach these with a panel bond adhesive. Welding works too but the panel bond puts out no sparks. From
What I’ve heard, this stuff is pretty strong. Besides, the seats will keep the supports in place. The owner of the Plymouth isn’t fat so the unsupported floor hasn’t buckled yet.

 

[MWbirdLOVER70]

I believe the outside tracks use the the bench track location so given that it should give you inside location. My car is bench and my partial pans from AMD had the reinforcements already installed which were removed after welding the pans in. Hope this helps some

 

[dsd1967]

I believe the floor pan is dimpled where the holes get drilled. The plates will pretty much line up and drop in place when you get them in their right location.

 

[66 Sat]

I may attach these with a panel bond adhesive. Welding works too but the panel bond puts out no sparks. From
What I’ve heard, this stuff is pretty strong. Besides, the seats will keep the supports in place. The owner of the Plymouth isn’t fat do the unsupported floor hasn’t buckled yet.

View attachment 1558357

I've used the panel bond adhesive on non-structural parts and it is good as long as the prep is done right and the adhesive is mixed properly with the special nozzle.
In this instance though, if you aren't welding the support plates in but instead using panel bond I would be gluing them on the underside (external). Otherwise they won't be providing much support (say in a crash scenario). If they are on the underside then the nuts/washers/support plates will be pulled against the existing floorpan, but if they are on the inside then they aren't really doing much - it will be the nuts/washers being pulled against the floorpan and then the bond strength only for the support plate, instead of the surface area of the plate itself trying to be pulled through the existing floorpan.
Does that make sense?

 

[Kern Dog]

Thanks. I see the merit in terms of crash-worthiness but….if they are wedged between the floor pan and seat brackets, where would they go? The car has been without these supports for many years already. The seat belts are anchored to the floor so any wreck would hold everything in place, right?

 

[Gus chiggins]

Thanks. I see the merit in terms of crash-worthiness but….if they are wedged between the floor pan and seat brackets, where would they go? The car has been without these supports for many years already. The seat belts are anchored to the floor so any wreck would hold everything in place, right?

I put 1/8 plates underneath those brackets, and I used panel bond adhesive on the bucket seat brackets on the passenger side. For some odd reason there were bucket seat brackets on the driver side floor pan. I discovered them when I pulled the bench seat.

 

[hunt2elk]

The floorpans should be dimpled where you need to drill the holes. The brackets are pretty self explanatory when you lay them in the car, they only fit nice in the location they are meant for. I think panel bond would be just fine to hold them in place. Not that it really matters, but I found that original braces were quite a bit larger/beefier than the AMD reproductions.

 

[Kern Dog]

My floor pans in the red car are covered in sound deadener matting. Rich's Coronet is here but he also covered the floor with the same stuff.

 

[DeltaV]

I can post some pictures of my '70 Charger floor this weekend if it stops raining. My car came with buckets.

 

[66 Sat]

Thanks. I see the merit in terms of crash-worthiness but….if they are wedged between the floor pan and seat brackets, where would they go? The car has been without these supports for many years already. The seat belts are anchored to the floor so any wreck would hold everything in place, right?

In a wreck the heavy seats are going to want to rip out of the floor. Even if the plates were on loose and not welded or bonded they are going to add something if underneath as they'd act as a giant washer. If placed on the top they will help with rocking or flexing from side to side, but not a vertical force.
If they are welded then fine, the weld should be as strong as the metal so it won't matter whether they are on the top or the bottom.

I wouldn't want the seats moving in a crash, and I wouldn't want to be the meat in the sandwich between the seat moving and the seatbelt holding me in place.

 

[azblackhemi]

We are converting this 69 Super Bee from a bench seat/column shift to buckets/console. Hope these pictures help.

 

[DeltaV]

My '70 Charger 500.
Right side bucket floor mounting; and I included brackets for console mounting reference:

 

[DeltaV]

From underneath (right side):

Forward outboard:

Aft outboard:

Forward inboard:

Aft inboard:

 

[DeltaV]

My '70 Charger 500.
Left side bucket floor mounting; and I included brackets for console mounting reference:

Above picture included to show there is no weld on top.

 

[Kern Dog]

Thank you so much!
That is odd how this one has such a wide rear U bracket over the tunnel:

I didn't remember that '70 Red car had that.

 

[DeltaV]

From underneath (left side):

Take a close look at the two hat-shaped "stiffener" locations. There are TWO holes...the "thru hole" for mounting of the bucket seat frame and another hole blocked by the floor panel. This isn't readily apparent in the pictures I posted yesterday for the right side, but they are there!

Forward outboard:

Aft outboard:

Forward inboard:

Aft inboard:

================================

The factory used this style nut in case you were wondering:

You will need a deep 1/2" socket to install them.