ConcoursMustang Forums
1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year => 1970 Mustang => Topic started by: Angela on July 12, 2021, 09:20:52 AM
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I'm embarrassed to admit I cannot recall what the two circled holes are for. Can anyone remind me what the two circled holes are used for? They appear to be partially (but not entirely) covered by the fuel tank mounting flange.
I believe the larger dia hole in the middle is for the fuel sending unit wire.
Also, is the small dia hole (indicated by the arrow) for some sort of grounding wire?
Thanks.
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I'm embarrassed to admit I cannot recall what the two circled holes are for. Can anyone remind me what the two circled holes are used for? They appear to be partially (but not entirely) covered by the fuel tank mounting flange.
I believe the larger dia hole in the middle is for the fuel sending unit wire.
Also, is the small dia hole (indicated by the arrow) for some sort of grounding wire?
Thanks.
PO installation of a trailer hitch.Fairly common in the 60's and early 70's.
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Thanks Bob. Interesting. I wish I'd realized this before paint. :-(
I am not sure how I'm going to "plug" these holes given body & paint work is completed. Perhaps I can find a rubber body plug to fit.
Do you agree the large dia hole in the center is the fuel sending unit wire?
Also, is the very small hole noted with the arrow for some sort of grounding wire for something?
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Thanks Bob. Interesting. I wish I'd realized this before paint. :-(
I am not sure how I'm going to "plug" these holes given body & paint work is completed. Perhaps I can find a rubber body plug to fit.
Do you agree the large dia hole in the center is the fuel sending unit wire?
Also, is the very small hole noted with the arrow for some sort of grounding wire for something?
Someone else will have to give confirmation on the other holes. 1970 is not my typical year of interest so I can't be sure of the other holes just the trailer hitch bolt pattern which is the same 65-70 Mustang .
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Thanks Bob. Interesting. I wish I'd realized this before paint. :-(
I am not sure how I'm going to "plug" these holes given body & paint work is completed. Perhaps I can find a rubber body plug to fit.
Might want to hunt down hard plastic plugs with the thin sharp edges and paint then to match the floor pan color on the undercarriage so they don't stand out as much. from a distance they may not stand out that way against everything else in the somewhat darker undercarriage
Do you agree the large dia hole in the center is the fuel sending unit wire?
For your year and car - Yes
Also, is the very small hole noted with the arrow for some sort of grounding wire for something?
Not for some ground wire. Instead it appears to be a screw holes that holds a rubber coated J clip (thing like the ones that often are attached to the top of the drivers side engine valve cover) that held the end of the fuel sender wire at the pass through hole
(https://www.concoursmustang.com/forum/gallery/15/6-120721160421-157122335.jpeg)
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Thanks Jeff! I can't visualize the J-clip you're referring to. If anyone has an idea of what type of clip this is, I'd appreciate the help (PN, picture, etc). I would expect there to be interference with this clip and the fuel tank mounting flange?
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Thanks Jeff! I can't visualize the J-clip you're referring to. If anyone has an idea of what type of clip this is, I'd appreciate the help (PN, picture, etc). I would expect there to be interference with this clip and the fuel tank mounting flange?
Once again, refer to the "Mustang Hardware Spreadsheet 69-70" by application (AP06.XLSX) in the library.
(Hint: "Wiring Harn,Fuel Level-Body@Trunk -".)
Jim
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1970 is not my typical year of interest so I can't be sure of the other holes just the trailer hitch bolt pattern which is the same 65-70 Mustang .
I had a 1969 Mustang Sportsroof that I added a hitch to. Same two holes in front of the gas tank. There were two more holes in the bumper as well. It was for towing a fiberglass dune buggy: Pismo Beach, Marina Beach, Italian Bar in the Sierras were a few place the "gang" went. Fold down the rear seat, flip up the trap door, fold the passenger's seat forward, stuff the clothes bag in the gap and spread out the sleeping bag for over nighters. It was tight (I'm 6 foot) but doable.
In that time period, Mustangs were just another car used for commutes, shopping, travels. It was a fun car.
Jim
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I had a 1969 Mustang Sportsroof that I added a hitch to. Same two holes in front of the gas tank. There were two more holes in the bumper as well. It was for towing a fiberglass dune buggy: Pismo Beach, Marina Beach, Italian Bar in the Sierras were a few place the "gang" went. Fold down the rear seat, flip up the trap door, fold the passenger's seat forward, stuff the clothes bag in the gap and spread out the sleeping bag for over nighters. It was tight (I'm 6 foot) but doable.
In that time period, Mustangs were just another car used for commutes, shopping, travels. It was a fun car.
Jim
Pretty common story except most didn't tow something cool like a Dune Buggy ,Cobra , name your poison, etc. I knew some people that only installed them a a status symbol of multiple options (before CB radios) and didn't even pull anything. Just had it so they could if they had to.
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You'll know if it was actually used since not only did it tie into the bumper but some into the taillight panel as well. The resulting damage to the body can be severe.
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You'll know if it was actually used since not only did it tie into the bumper but some into the taillight panel as well. The resulting damage to the body can be severe.
All of the ones I am familiar with attached in the holes like in the picture and the rear bumper only. Not disputing your observation just that the tail panel was not the typical attachment point from the many I have observed over the years.
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Thanks Jeff! I can't visualize the J-clip you're referring to. If anyone has an idea of what type of clip this is, I'd appreciate the help (PN, picture, etc). I would expect there to be interference with this clip and the fuel tank mounting flange?
Looks like
https://www.npdlink.com/product/wire-j-clip-oil-sending-unit/167442?backurl=search%2Fproducts%3Fsearch_terms%3Dfuel%252Bline%252Bwire%252Bclip%252B%26top_parent%3D200001%26year%3D1970&year=1970 (https://www.npdlink.com/product/wire-j-clip-oil-sending-unit/167442?backurl=search%2Fproducts%3Fsearch_terms%3Dfuel%252Bline%252Bwire%252Bclip%252B%26top_parent%3D200001%26year%3D1970&year=1970)
Don't have a 70 at home to check but this may has been added after the tank was installed so it would not interfere
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If your tank is still out you can go ahead and weld up those two holes and then get a aerosol can of single stage body color from paintscratch.com. Since this area is not very visible I think your repair would be acceptable
Craig
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Looks like
https://www.npdlink.com/product/wire-j-clip-oil-sending-unit/167442?backurl=search%2Fproducts%3Fsearch_terms%3Dfuel%252Bline%252Bwire%252Bclip%252B%26top_parent%3D200001%26year%3D1970&year=1970 (https://www.npdlink.com/product/wire-j-clip-oil-sending-unit/167442?backurl=search%2Fproducts%3Fsearch_terms%3Dfuel%252Bline%252Bwire%252Bclip%252B%26top_parent%3D200001%26year%3D1970&year=1970)
Don't have a 70 at home to check but this may has been added after the tank was installed so it would not interfere
It's "Similar" to the NPD listed part, 353547-S2, which was used on 1969-70 small block LH valve covers. The correct Ford hardware part number is 381645-S100. It's unique in that it has a "dip" downward just after the mounting hole, then returns to the flat before the "J" hook.
See attached.
Drawing from "Ford Standard and Utilities Parts Catalog, January 1969" (AM0205 pg41). Application is from "1970 Mustang Electrical Assembly Manual" (AM0033 pg42).
Jim
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Unique tank wire sender holder j strap (and not been repoed yet that i know of anyway) these j straps were held in place useing the tank mounting screws not screwed to the trunk floor so that small hole in center i think was added maybe a grounding wire or something or electric fuel pump.
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Unique tank wire sender holder j strap (and not been repoed yet that i know of anyway) these j straps were held in place useing the tank mounting screws not screwed to the trunk floor so that small hole in center i think was added maybe a grounding wire or something or electric fuel pump.
Good eye Ed - didn't align the holes in the OPs picture with the originals. Not sure of the purpose but if they mounted the fuel pump below I don't see extra holes for mounting the pump. Really doesn't matter in our focus here on the site other than its not original so it needs/needed to go
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Here's the culprit. I took this off of a 1970 Mach1 nearly 40 years ago. Pulled it out of the bushes for a couple pictures. Part number is C9ZJ-19D520-A. Notice that this one also attached to the cross member in the trunk just behind the tail light panel. Probably an updated version from the earlier ones that were known to bend the rear bumper.
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I only have this screenshot from a video, but the damage to the rear panel was great. You can just make out the two holes in the panel below the gas cap area. We went through great pains to metal work the area and keep the numbers and spot welds intact.
It looks to be a variant of K-HESS's hitch design.
I have no idea where the the majority of the hitch went. I kept only a few pieces.
I wonder if the original rear bumper was replaced due to the holes in it.
When I got the car it was replaced with a Ford C7 labeled bumper.