I was wondering if anyone knows or has swapped in a gas tank out of a 73-79 under bed tank into a 67. I would like to free up some space in the cab and was looking to purchase a donor truck with 2 under bed tanks (and lots of other fun goodies). Any tips, pointers or things to look out for?

 

The 73-79 tanks are too wide for these years. A 65 mustang tank fits well.

 

does it matter if it is a coupe, or fastback?

 

i'm using a tank from a 96 ranger. it sits inside the frame rail . i had to flip the cross member in front of the rear end to get it to fit and make my own straps for it but it works and i have the fuel pump in the tank.

 

i heard a tank out of a isuzu truck [yuck] will work . dont know whats involved in installing it though just something i was told would work

 

i used to have the tank behind the seat in my '70. even though i'm a welder and get burt by hot slag every now-and-then, i didn't want to die in a firey gas ball because some shmuck is trying to eat, talk on a cell phone and switch cd's in the radio and blow a stoplight or something. i tossed mine in the garbage.
to make-up for the loss i had a '76 f-350 donor.
i took the electric fuel switch and the rear tank, the tank closest to the rear bumper.
in my research i found that the inside to inside frame rail measurment on my '70 was 2'10".
the rear tank measured at its widest point at 2'-10 5/8".
now, if you have any expierience w/a mig (wire feed) welder then all you have to do is:
FIRST AND THE MOST IMPORTANT STEP!!!!!!!!
drain and use a high pressure washer to clean out all the years of crud.
SECOND: LET SIT FOR AT LEAST THREE DAYS!!!!!-this is to make sure any and all fuel vapors are non-exsisting inside the tank.
THIRD: all you need is to shave off 3/8" from the sides where the machines seemed the 2 halfs together. by doing this you gain 3/4" in clearance.
NEXT:this is where the welding comes in, by shaving off the metal there is going to be leaks!!! just weld the two halfs back up an test for leaks and spot weld accordingly.
LAST: just run the lines hook up the filler by either recessing it into the bed side, or the more ghetto way and go through the flooring inside your bed.
hook up the sending unit and tank selector, (mechanical or electric whatever you choose) and BLAM! there you go. don't forget the tank straps or it's all for nothing!!

this is really easier then you might think. after it sat and air-dried 3 days it took me a couple of hours to slap it up into my truck and since i already had the donor truck, it cost me the price of the local self-serve car wash.

if your mechanical ability is pretty low, or you don't know how to weld,
then i would not attempt this modification.

i cannot stress enough about washing and letting it sit and air dry for at least 3 days! so it doesn't blow up in your face when you arc the welder.

p.s. i hope i didn't upset anyone by explaining this step-by-step process.
like i said earlier "i'm a welder". and i get board alot!!!! when i get board i'll chop something up, just so i can weld it back together (slightly modified of coarse).

 

Quite the contrary, I THANK you for this step by step. I have access to a FREE tank (needs some TLC) but none the less it is free!! I will be picking it up TODAY and getting buisy on it!!! I may even grab the front tank as well just for the added capacity of dual tanks!!!!

again I thank you SO very much for this DIY step by step, you shall be rated accordingly!!!

 

ranger240, your welcome. if i only had a reliable digital camera i would post pics of all the mods i've done to my '70 f-100. for instance, i wanted a floor shifter for my C-6 but i don't like the looks or action of a slapshifter. so i went to the bone-yard and found a '93 t-bird that had a C-6. instead of having a shift rod it had a shift cable.
that made the mod super easy! i could run the cable anywhere i wanted so it would tuck-up under the frame neatly. i also did the power steering at the same time w/the parts from the same '76 donor. i had at least 6 different people try to tell me it wouldn't work, that the steering box wouldn't bolt-up or the shafts wouldn't fit.
the steering box bolted and fit exactly like my stock steering-box, and if i need to replace it, it's about $200 less then buying a '70 steering box! the only thing that was different was the shaft so i just used the one from the '76, worked great!
i could go on and on about what i've done but i type about as slow as my computer is fast! as a matter of fact i've had to stop and take 4 different smoke breaks just to type this!lol!!!
anyway, your very much welcome!

p.s. what are these thread ratings and how do i see mine?
what's the highest/lowest ratings someone could possibly achieve?
can someone be locked out of FTE if there ratings are too low?

 

there is a little scale in the top right corner of each post, and I am not EXACTLY sure why but I was told to aknowledge people and their posts when ever possible. has to do with popularity I think , anyway I gave you good marks!!! I am pretty sure it has something to do with the little green square next to your post count, again, at the top right of each post.

someone clue us in!!! hahaha

yep I am getting my tank this friday, and I am also getting the long tank from under the bed in front of the axle...FREE!!!!!! I may be getting a free 76 parts truck with a $400 '68 ranger the same guy has, IF the wife says it's cool.

wish me luck!!! hahaha looks like I'll be a-weldin' fool come next friday!!!!