ConcoursMustang Forums

1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year => 1970 Mustang => Topic started by: machm1970 on December 29, 2015, 03:49:44 PM

Title: How to tell an original gas tank?
Post by: machm1970 on December 29, 2015, 03:49:44 PM
I'm disassembling my '70 Dearborn built convertible. The gas tank looks old, but there's no drain plug. How do I tell if it's original?
Thanks,
Matt
Title: Re: How to tell an original gas tank?
Post by: preaction on December 29, 2015, 04:51:02 PM
67-68 has a date stamped on the flange.
Title: Re: How to tell an original gas tank?
Post by: Bob Gaines on December 29, 2015, 05:07:40 PM
Quote from: machm1970 on December 29, 2015, 03:49:44 PM
I'm disassembling my '70 Dearborn built convertible. The gas tank looks old, but there's no drain plug. How do I tell if it's original?
Thanks,
Matt
I believe it was later 69 production that the drain plugs were eliminated from the assemblyline tanks.
Title: Re: How to tell an original gas tank?
Post by: svo2scj on December 29, 2015, 07:37:29 PM
MY late 69 SCJ had the original tank (look like this) !  (http://i38.photobucket.com/albums/e136/svo2scj/100_0214.jpg) (http://s38.photobucket.com/user/svo2scj/media/100_0214.jpg.html)

I used OOOO steel wool and phosphate to clean (http://i38.photobucket.com/albums/e136/svo2scj/100_0424.jpg) (http://s38.photobucket.com/user/svo2scj/media/100_0424.jpg.html)

 ALmost positive that there is a date stamp on the seam - I"ll bet Marcus will see this and WILL BE A TOPIC !! LOL
THere are not many that know the USS run numbers on there cars as the stamp MAY or MAY NOT be on 100%   Mine wasn't all there but nes 69 7236 was.

Mark
P.S.  Phosphate removes ink !




Title: Re: How to tell an original gas tank?
Post by: machm1970 on December 29, 2015, 10:38:13 PM
That's awesome, that's what mine looks like. My next question was going to be restoration. Where can I get the phosphate?
Thanks,
Matt
Title: Re: How to tell an original gas tank?
Post by: Toploader on December 30, 2015, 03:26:19 PM
Quote from: machm1970 on December 29, 2015, 10:38:13 PM
Where can I get the phosphate?

Yes, I second that question. What exactly do you mean by "phosphate"? Thanks.
Title: Re: How to tell an original gas tank?
Post by: svo2scj on December 30, 2015, 11:34:54 PM
I used Eastwood METAL BLACKENER SOLUTION .  It says it is Selenious Acid.  A little goes a long way as you just wet the pad a few times. 

Eastwood is expensive and this is the probably not the BEST use of product  - but the result were great.  I also used this for the brake lines, gas lines and driveshaft all reused on my car.    (I know that most can't do to rust)   

Mark
P.S.  Yeah I know -those that know me know "I'm mad at my money!" so when someone says " I used a Brillo pad" - DO THAT !
Title: Re: How to tell an original gas tank?
Post by: specialed on January 01, 2016, 02:37:10 PM
assembly line tanks had a date stamped by seam weld lh side on last tank I looked at
Title: Re: How to tell an original gas tank?
Post by: Brian Conway on January 01, 2016, 05:29:24 PM
...so that would make it the down side of the mounting flange and unviewable when installed.  Brian
Title: Re: How to tell an original gas tank?
Post by: J_Speegle on January 01, 2016, 06:28:40 PM
Quote from: Brian Conway on January 01, 2016, 05:29:24 PM
...so that would make it the down side of the mounting flange and unviewable when installed.  Brian

Yes from the ones I've seen - like some of the driver's side trunk floor stamping date locations