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Old 10-16-2011, 05:24 PM   #1
hammerdog57
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link to mustang gas tank install

Did a search but couldnt find it. I remember seeing a thread about installing a 65-68 mustang gas tank in a 55-57 red primered big window pickup. If i remember right installation in thread wasnt completed because truck was sold. Anyone have the link?

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Old 10-16-2011, 11:35 PM   #2
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Re: link to mustang gas tank install

Here are some pics hope this helps some are from the hamb and the other on the web. What I did was drill ribits out of rear crossmember and flipped opposite way and moved toward the end of frame stock holes all lined up so it was an easy bolt in.
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Old 10-17-2011, 08:26 PM   #3
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Re: link to mustang gas tank install

What is are you using for a sending unit? I want to use the stock fuel gage.
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Old 10-17-2011, 11:32 PM   #4
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Re: link to mustang gas tank install

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What is are you using for a sending unit? I want to use the stock fuel gage.
Made a round metal ring and welded to top of tank added a little JB Weld epoxy around ring where I welded it for cheap insurance for leaks. I tapped the ring for stock sending unit. All I had to do was cut down a new stock sending unit replacement for depth of tank.
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Old 01-19-2014, 02:54 PM   #5
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Re: link to mustang gas tank install

I realize nobody has posted on this thread in a while, but I've been reading the forums all week, & looking to do this on my '58 Chevy stepside.
I have alot questions.

1. When relocating the rear crossmember, does it weaken the support for the stock leaf springs
2. What filler neck can be used for rear fill, & flip down license plate bracket
3 What size channel is used at the rear of the tank for support in the above photos.
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Old 01-19-2014, 04:35 PM   #6
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Re: link to mustang gas tank install

It does weaken the support in that area. I would leave the cross member in and mount to the lower rail. The fill is a 2" at the tank, You would need a tight 90 bend and a fill neck. You may be able to fab the old fill neck to work. As for the tank support 1" square tube 0.90 (3/32) wall would be good, make a box and sandwich the tank between the box and lower frame rail.
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Old 01-19-2014, 04:54 PM   #7
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Re: link to mustang gas tank install

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It does weaken the support in that area. I would leave the cross member in and mount to the lower rail. The fill is a 2" at the tank, You would need a tight 90 bend and a fill neck. You may be able to fab the old fill neck to work. As for the tank support 1" square tube 0.90 (3/32) wall would be good, make a box and sandwich the tank between the box and lower frame rail.
What if I got rid of the leafs?
I have a rear axle under the truck from a '77 Malibu wagon.
Would I improve the ride by going with a coilover setup, & thus not need to worry about the lack of support from relocating the crossmember?
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Old 01-19-2014, 06:57 PM   #8
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Re: link to mustang gas tank install

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What if I got rid of the leafs?
I have a rear axle under the truck from a '77 Malibu wagon.
Would I improve the ride by going with a coilover setup, & thus not need to worry about the lack of support from relocating the crossmember?
You only need the member in that position for the spring shackles. Using coils or coil overs you would move that member to the back because you do need something to stabilize the rear frame section and offer some protection for the tank.
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Old 01-19-2014, 10:29 PM   #9
Dan in Pasadena
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Re: link to mustang gas tank install

It doesn't seem like moving the crossmember would be THAT big an issue with a street truck like ours that is unlikely to carry much; if any significant load. I don't think I'd be too worried about that.

If the tank bolted to the upper flange without additional support, it'll bolt to the bottom flange with no structural concern. So you're suggesting surround the tank just for collision protection?

I'm thinking Rudy bolted it as he did - on top of a square tube spacer - to increase the ground clearance. Plus, MAYBE(?) that spacer serves to allow the tank to be removed from below if you can take that spacer out?

What I like about his installation is you can buy. New mustang tank for less than $100 brand new. That makes welding it doable. I'd never try welding on a used tank, full of water or otherwise.
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Old 01-19-2014, 11:00 PM   #10
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Re: link to mustang gas tank install

Ok, so I just checked eBay and there are lots of new Mustang tanks in the $100+ range all the way up to $700! Why the hell would you buy something for $700 that you could get for $100+?

What irritates me is that the otherwise-identical one listed there that is already configured to fit a '55-'59 Chevy truck is $218. Doesn't cost an additional cent to make the sending unit hole a different shape but they're sticking us for an extra $100 because they can. Damn.
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Old 01-19-2014, 11:50 PM   #11
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Re: link to mustang gas tank install

The original tank is a bottom sender/pickup tube with no fuel tray for EFI. You then have to modify it for the correct sender or make some kind of adapter for it to work with a early GM gauge, You then need a pump that has a fuel tray adapt that to the tank. If your not doing efi then a $80 tank would work but may fail inspection because you can't use a bottom pickup tank in anything that it did not originally come in. Bottom pickup or a sump pickup are not legal any longer.

We did this whole discussion 2 weeks ago about $80 tanks.
http://67-72chevytrucks.com/vboard/s...=396325&page=3
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Old 01-19-2014, 11:55 PM   #12
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Re: link to mustang gas tank install

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Originally Posted by Dan in Pasadena View Post
Ok, so I just checked eBay and there are lots of new Mustang tanks in the $100+ range all the way up to $700! Why the hell would you buy something for $700 that you could get for $100+?

What irritates me is that the otherwise-identical one listed there that is already configured to fit a '55-'59 Chevy truck is $218. Doesn't cost an additional cent to make the sending unit hole a different shape but they're sticking us for an extra $100 because they can. Damn.

The $218 one is for EFI and it does have internal modifications and external changes. Its nothing like the $80 tank and it won't work for a stock mustang car. Its coated steel and has the proper holes for EFI pump and sender. The $80 stock tank has one hole near the bottom of the tank for a pickup and sender. It won't work for EFI at all without a lot of modifications.
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Old 11-29-2016, 05:15 PM   #13
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Re: link to mustang gas tank install

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The $218 one is for EFI and it does have internal modifications and external changes. Its nothing like the $80 tank and it won't work for a stock mustang car. Its coated steel and has the proper holes for EFI pump and sender. The $80 stock tank has one hole near the bottom of the tank for a pickup and sender. It won't work for EFI at all without a lot of modifications.
that's not at all true. I have been using a stock 65 Mustang tank without any fuel tray for EFI at all for over two years and that's with a 5.3 fuel injected motor. Unless you are slomning or quarter mileing on a near empty tank, you will not go side to side enough for the fuel to go away from the pickup

If you want to see how it's done check out my 49 build in my signature.

Last edited by skymangs; 11-29-2016 at 05:21 PM.
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Old 11-29-2016, 05:30 PM   #14
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Re: link to mustang gas tank install

"The $218 one is for EFI and it does have internal modifications and external changes. this is definitely true


Its nothing like the $80 tank and it won't work for a stock mustang car. This is also trueif your attempting to use a stock sender pickup on the EFI tank .

it Its coated steel and has the proper holes for EFI pump and sender. Again also true.

The $80 stock tank has one hole near the bottom of the tank for a pickup and sender. also true.

It won't work for EFI at all without a lot of modifications"
It would work with a stock sender to plug the hole in the bottom and using an pump like a PA series. or an external pump with the stock sender and pickup so its half true

I can agree with you here somewhat, You may or may not have a starvation issue without the tray but for the price of it I prefer to have a tray in it or a pump that has a cup.
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Old 11-29-2016, 06:13 PM   #15
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Re: link to mustang gas tank install

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"The $218 one is for EFI and it does have internal modifications and external changes. this is definitely true


Its nothing like the $80 tank and it won't work for a stock mustang car. This is also trueif your attempting to use a stock sender pickup on the EFI tank .

it Its coated steel and has the proper holes for EFI pump and sender. Again also true.

The $80 stock tank has one hole near the bottom of the tank for a pickup and sender. also true.

It won't work for EFI at all without a lot of modifications"
It would work with a stock sender to plug the hole in the bottom and using an pump like a PA series. or an external pump with the stock sender and pickup so its half true

I can agree with you here somewhat, You may or may not have a starvation issue without the tray but for the price of it I prefer to have a tray in it or a pump that has a cup.
Okay, for the price it is good to have a tray. What I run is $70 mustang tank. I'm using the stock fuel pickup, an external pump, and a corvette style fuel filter with a return. On top of the tank I just drilled with a hole–saw for the stock brand-new sender. And I put a brass 90° elbow for the return into the tank. I was just saying that it wasn't necessary to have a tray.
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Old 01-20-2014, 12:46 AM   #16
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Re: link to mustang gas tank install

Ok thanks.

Well, I'm not doing EFI and there are no inspections on cars in California but still I'd definitely not want a bottom sender so back to the drawing board I suppose. It didn't look like Rudy's ("Rude Dude" above) was a bottom anything.
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Old 01-20-2014, 01:22 AM   #17
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Re: link to mustang gas tank install

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Ok thanks.

Well, I'm not doing EFI and there are no inspections on cars in California but still I'd definitely not want a bottom sender so back to the drawing board I suppose. It didn't look like Rudy's ("Rude Dude" above) was a bottom anything.
The tank at the top of this page is a bottom pickup/sender that he modified to use a top pickup on. Its in the from bottom of the tank. The picture is a stock tank.
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Old 01-20-2014, 06:50 PM   #18
Dan in Pasadena
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Re: link to mustang gas tank install

Does the $200+ tank work with a carbureted engine without modification?

With the stock Mustang tank (lower priced) I'd have to not only weld shut the bottom sender hole but also cut a hole for a sender on top, AND figure out a way for the filler spout to come up perfectly vertical instead of canted to the rear as it appears to be in the pic's.
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Old 01-20-2014, 06:55 PM   #19
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Re: link to mustang gas tank install

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Does the $200+ tank work with a carbureted engine without modification?

With the stock Mustang tank (lower priced) I'd have to not only weld shut the bottom sender hole but also cut a hole for a sender on top, AND figure out a way for the filler spout to come up perfectly vertical instead of canted to the rear as it appears to be in the pic's.
The $218 tank has a place for the sender and another for a pump or regular pickup tube. The pickup tube is about $30 and the sender is about $30 so for $260 shipped you just mount it and plumb it. No welding or making ford senders work with gm gauges.
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Old 01-20-2014, 07:50 PM   #20
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Re: link to mustang gas tank install

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The $218 tank has a place for the sender and another for a pump or regular pickup tube. The pickup tube is about $30 and the sender is about $30 so for $260 shipped you just mount it and plumb it. No welding or making ford senders work with gm gauges.
Wheres the link for the $218 tank?
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Old 01-20-2014, 08:00 PM   #21
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Re: link to mustang gas tank install

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Wheres the link for the $218 tank?
Its actually $210

http://www.hollisterroad.com/proddetail.asp?prod=MU-HT

It doesn't come with the cap shown. It comes with a bolt-on neck. a rubber gas hose and the gaskets for pump/pickup and sender.
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Old 07-02-2014, 01:27 PM   #22
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Re: link to mustang gas tank install

This is the tank I'll be using for my 70 C10 from Tanks Inc. # MU-H it comes with with the location for the sender at the top and a 3/8 pick up tube at the front of the tank or the back, depending on how you look at. My only concern is how to vent the tank with out adding or drilling any additional hole in the tank I called Tank Inc, and they just said to use a vented cap, but there has to be another way to vent it properly. I got this tank on ebay for $204.00. I was looking for something I didn't have to modify too much, and since My truck is bagged, the tank sits up in the frame. I had a LMC tank in there before. It just looked to ugly, and sat too low.. If anyone has any suggestions I sure would appreciate it...

I hope this link works...
http://www.tanksinc.com/cartimages/prod_zm_310.jpg
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Old 07-02-2014, 01:58 PM   #23
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Re: link to mustang gas tank install

You don't have many options with that tank other than drilling and welding in a bung or drilling a hole in the sender and tapping a 1/8 pipe for a fitting or using a vented cap.

Had you gotten the MU-T you would have the pickup and sender in the top and the pickup for an MU-T has a vent pipe port.
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Old 07-02-2014, 02:52 PM   #24
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Re: link to mustang gas tank install

I did think about the MU-T, but its a efi tank. Would it have made a difference? But drilling and tapping a hole in the sending unit might do the trick, sound easy enough....

Thanks Dave.....
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Old 07-02-2014, 03:11 PM   #25
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Re: link to mustang gas tank install

The EFI tank has a fuel tray and a standard pickup can be used instead of a pump. Major difference is that it has the pickup and the sender on top.
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