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70 Gas tank in a 67

  • Thread starter Thread starter 1967project
  • Start date Start date Jan 22, 2007

1967project

New Member
Dec 28, 2006
89
0
0
Oklahoma
Jan 22, 2007
#1
  • Jan 22, 2007
  • #1
So I have heard that a 70's gas tank was 5 gallons larger than a 67. Is it possible to stick a 70's gas tank in a 67 without alot of modification?
 

1320stang

Founding Member
Nov 13, 1998
4,329
23
89
Edmond, Oklahoma
Jan 22, 2007
#2
  • Jan 22, 2007
  • #2
You'll need to shorten your filler neck and put a big stick in the tank stub and tweek it a bit backwards.
 

thehueypilot

Active Member
Feb 25, 2004
1,084
0
37
Medina,Tennessee
Jan 22, 2007
#3
  • Jan 22, 2007
  • #3
I put a 70 model tank in my 68 with no issues. The filler neck needs adjusted like mentioned above and you need a sending unit for the 70 model tank to get your fuel gage to register "full" correctly.
 
B

bnickel

Founding Member
Aug 21, 2002
5,640
3
77
lubbock, texas
Jan 22, 2007
#4
  • Jan 22, 2007
  • #4
very easy project. i put a 70 tank in my 69 as well, though there are no mods needed to do that on the 69 just have to use the 70 sending unit. you don't have to worry about re-wiring anything for the swap on any vintage mustang they all just use a one wire sending unit so it's plug and play.
 
S

SNAKEPILOT

New Member
Jul 8, 2005
112
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Jan 22, 2007
#5
  • Jan 22, 2007
  • #5
Maybe I am too picky about the alignment of the tank and the neck but...I started out putting a 69 tank in my 67 fastback. The alignment was way off. 69 tanks have the opening about an inch and a half further back than the 65-68 and 70 tanks. Luckily the shop had a 69 that was being worked on that needed a tank so I didn't have to eat the tank or the return shipping. We put in the 70 tank and it was close but not quite right. We ended up having a muffler shop bend a pipe and then welded the cap flange on the end. That was after we tried three different year filler necks.
I like how the tank height is even with the trunk sides. It will make carpeting much easier. A standard trunk mat won't fit correctly now.
 
B

bnickel

Founding Member
Aug 21, 2002
5,640
3
77
lubbock, texas
Jan 22, 2007
#6
  • Jan 22, 2007
  • #6
SNAKEPILOT said:
Maybe I am too picky about the alignment of the tank and the neck but...I started out putting a 69 tank in my 67 fastback. The alignment was way off. 69 tanks have the opening about an inch and a half further back than the 65-68 and 70 tanks. Luckily the shop had a 69 that was being worked on that needed a tank so I didn't have to eat the tank or the return shipping. We put in the 70 tank and it was close but not quite right. We ended up having a muffler shop bend a pipe and then welded the cap flange on the end. That was after we tried three different year filler necks.
I like how the tank height is even with the trunk sides. It will make carpeting much easier. A standard trunk mat won't fit correctly now.
Click to expand...



that's why you have to bend the neck on the tank itself, not the filler tube. you put a piece of pipe/tubing in the neck of the tank and pry on it until you get it in the right place. i don't know why the 70 tank would be any different than the 69 tank you had, mien were identical in that respect.
 

yeloxr7

Member
Apr 18, 2005
429
0
16
Jan 22, 2007
#7
  • Jan 22, 2007
  • #7
bnickel said:
that's why you have to bend the neck on the tank itself, not the filler tube. you put a piece of pipe/tubing in the neck of the tank and pry on it until you get it in the right place. i don't know why the 70 tank would be any different than the 69 tank you had, mien were identical in that respect.
Click to expand...

The tank in question is the 1970 non-emission tank that holds 22 gallons of fuel, versus the 69-70 emissions tank that holds 20 gallons.
 
B

bnickel

Founding Member
Aug 21, 2002
5,640
3
77
lubbock, texas
Jan 22, 2007
#8
  • Jan 22, 2007
  • #8
yeloxr7 said:
The tank in question is the 1970 non-emission tank that holds 22 gallons of fuel, versus the 69-70 emissions tank that holds 20 gallons.
Click to expand...


i've never had an emissions tank, all my cars have been Texas cars. my 69 came with the standard 20 gallon tank and i swapped in a tank from a 70 cougar and later replaced it with a brand new 70 mustang tank, direct bolt in for my car, but for the 67/68 cars the rank would need the neck bent to fit the angle of the filler tube.
 
S

SNAKEPILOT

New Member
Jul 8, 2005
112
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0
Jan 22, 2007
#9
  • Jan 22, 2007
  • #9
The neck on the tank appears to be soldered not welded. I would be careful bending it. The filler/tank connection could be a weak link in even a minor accident. A foot of muffler pipe bent by a friendly muffler shop was a cheap (free) way to get a perfect fit.
 

Jsprint68

New Member
Sep 10, 2003
54
0
0
NJ
Jan 22, 2007
#10
  • Jan 22, 2007
  • #10
Put a 70 into my 68 coupe.





Pictures are here if they don't come up!

http://www.cardomain.com/ride/2038148/3

I cut an inch off of the filler neck and used a piece of 2-1/2" SCH-40 PVC pipe (cause that’s what I had handy) to tweak the opening in the tank back a little. It does look like it's soldered on.
 

Jester67

Member
Sep 21, 2004
908
1
18
TN
Jan 23, 2007
#11
  • Jan 23, 2007
  • #11
I have a write up with pics on here some where do a search and it should help.
 

coolblue65

Founding Member
Jul 26, 1999
1,224
2
39
Algonquin, IL
Jan 23, 2007
#12
  • Jan 23, 2007
  • #12
Do these bigger tanks fit in the 65-66's as well?
 

Jester67

Member
Sep 21, 2004
908
1
18
TN
Jan 23, 2007
#13
  • Jan 23, 2007
  • #13
Yes
 
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