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Trunk drop off drain holes
#1
Does someone have a picture of the hole and the actual drain plug on the trunk drop offs? Thanks, Ryan.

1973 Mach 1, Porsche Guards Red, 429/C6
1972 Mach 1, Grabber Blue, 302/C4, currently under construction
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#2
Heres the link to drain plugs on NPD;
https://www.npdlink.com/store/products/p...759-1.html

This is the full plug kit for all the holes on the car;
https://www.npdlink.com/store/products/p...089-1.html

This is the 91971) link to trunk drop-off panel with the drain plug holes;
https://www.npdlink.com/store/?p=catalog...&year=1971

Hope this helps.
I got a 2 inch square of rust around my left hand drop off plug hole so i bought a complete drop off panel. They are under $17 so worth replacing the entire drop off IMO

Steve
1971 Grandé
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#3
I'm not sure those are actually 'drain holes,' per se... they're not anywhere close to the bottom of the quarter panels/trunk drop-offs.

I know one of those holes is for the fuel sender wiring to pass thru to the rear-end harness.

I also believe the 'drain holes' for the quarter panel/trunk drop-off junction is simply a small opening at the lowest point, exiting into the rearward bottom edge of the wheel well opening.

I could be wrong, though.

Eric

[Image: mach1sig2.gif]
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#4
Pegleg;284475 Wrote:Heres the link to drain plugs on NPD;
https://www.npdlink.com/store/products/p...759-1.html

This is the full plug kit for all the holes on the car;
https://www.npdlink.com/store/products/p...089-1.html

This is the 91971) link to trunk drop-off panel with the drain plug holes;
https://www.npdlink.com/store/?p=catalog...&year=1971

Hope this helps.
I got a 2 inch square of rust around my left hand drop off plug hole so i bought a complete drop off panel. They are under $17 so worth replacing the entire drop off IMO

Peg leg, the plugs that you show are for the trunk floor holes above the frame rails. I have the plug kit that you list. I found a picture of the plugs on the 429 mustangcougar website. I would like to see how the plugs are installed on an original car. A lot of cars that have had the trunk dropoffs replaced do not have these.

.jpg   fendervents1.jpg (Size: 164.69 KB / Downloads: 188)

1973 Mach 1, Porsche Guards Red, 429/C6
1972 Mach 1, Grabber Blue, 302/C4, currently under construction
  Reply
#5
Mister 4x4;284487 Wrote:I'm not sure those are actually 'drain holes,' per se... they're not anywhere close to the bottom of the quarter panels/trunk drop-offs.

I know one of those holes is for the fuel sender wiring to pass thru to the rear-end harness.

I also believe the 'drain holes' for the quarter panel/trunk drop-off junction is simply a small opening at the lowest point, exiting into the rearward bottom edge of the wheel well opening.

I could be wrong, though.

I believe the holes towards the front of the dropoffs are for the drain plugs and the one towards the rear is for the fuel sending grommet.

1973 Mach 1, Porsche Guards Red, 429/C6
1972 Mach 1, Grabber Blue, 302/C4, currently under construction
  Reply
#6
73429mach;284506 Wrote:
Mister 4x4;284487 Wrote:I'm not sure those are actually 'drain holes,' per se... they're not anywhere close to the bottom of the quarter panels/trunk drop-offs.

I know one of those holes is for the fuel sender wiring to pass thru to the rear-end harness.

I also believe the 'drain holes' for the quarter panel/trunk drop-off junction is simply a small opening at the lowest point, exiting into the rearward bottom edge of the wheel well opening.

I could be wrong, though.

I believe the holes towards the front of the dropoffs are for the drain plugs and the one towards the rear is for the fuel sending grommet.

My hole toward the front of the drop off have round bungs in them too. As this hole is at the lowest point in the trunk i would assume thats where the water would drain down to. So logically thats where a bung would go to drain off as well as keeping water out whilst driving on wet roads. General Motors-Vauxall-Opel used the same bungs in the same place in the 70's here in the U.K.

Steve
1971 Grandé
  Reply
#7
Here are a few picture of my original drop offs. The rubber insert is a 'valve' that will allow water through it provide it is kept clear. I tried to picture it from inside with a mirror which unfortunately is not too clear. The top hole is a cable pass through plug.
Hope this helps with your issue.
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#8
[Here are a few picture of my original drop offs. The rubber insert is a 'valve' that will allow water through it provide it is kept clear. I tried to picture it from inside with a mirror which unfortunately is not too clear. The top hole is a cable pass through plug.
Hope this helps with your issue.]

Yes, that helps a lot! Thanks for the pictures. Thanks everyone else for the replies. Ryan

1973 Mach 1, Porsche Guards Red, 429/C6
1972 Mach 1, Grabber Blue, 302/C4, currently under construction
  Reply
#9
73429mach;284505 Wrote:
Pegleg;284475 Wrote:Heres the link to drain plugs on NPD;
https://www.npdlink.com/store/products/p...759-1.html

This is the full plug kit for all the holes on the car;
https://www.npdlink.com/store/products/p...089-1.html

This is the 91971) link to trunk drop-off panel with the drain plug holes;
https://www.npdlink.com/store/?p=catalog...&year=1971

Hope this helps.
I got a 2 inch square of rust around my left hand drop off plug hole so i bought a complete drop off panel. They are under $17 so worth replacing the entire drop off IMO

Peg leg, the plugs that you show are for the trunk floor holes above the frame rails. I have the plug kit that you list. I found a picture of the plugs on the 429 mustangcougar website. I would like to see how the plugs are installed on an original car. A lot of cars that have had the trunk dropoffs replaced do not have these.

I would appreciate it if you have a link to a vendor that sells those drain plugs as i am going to need a pair.

Steve
1971 Grandé
  Reply
#10
Stanglover;284545 Wrote:Here are a few picture of my original drop offs. The rubber insert is a 'valve' that will allow water through it provide it is kept clear. I tried to picture it from inside with a mirror which unfortunately is not too clear. The top hole is a cable pass through plug.
Hope this helps with your issue.

From those pictures i get the impression they fit via the exterior of the drop off panel

Steve
1971 Grandé
  Reply
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