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The 1947 - Present Chevrolet & GMC Truck Message Board Network (https://67-72chevytrucks.com/vboard/index.php)

- The 1967 - 1972 Chevrolet & GMC Pickups Message Board (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=3)

- - Chevelle Gas Tank Swap (https://67-72chevytrucks.com/vboard/showthread.php?t=554979)

luvbowties

12-22-2012 02:51 AM

Re: Chevelle Gas Tank Swap

Quote:

Originally Posted by Rudy-g (Post 5766115)

I got my new rear bumper and deluxe trac bar. There's a few issues with using this chelleve tank on a short wheel base truck.
1. The filler neck need to be shortened about 4"
2. The fuel sending unit, hard lines are also too long and hit the second cross member, To fix it I can either cut them or bend them. I'll try and bend them first
3. The rear bumper bolts up level to the frame, so if I mount the tank flush to the frame, I will need to modify the filler neck, and it will be laying flat, I'm not sure about that set up, I'm worried that the gas might leak out through my vented gas cap

Nice-looking addition you are doing, Rudy. As far as gas leaking, can't you just convert to a non-vent cap and install a vent tube with a filter about anywhere toward front/top of tank?
sam

Rudy-g

12-22-2012 04:35 AM

Re: Chevelle Gas Tank Swap

Hey Sam, well I guess I could go with a non-vented cap. When I ordered the tank, I had the option of getting a vented gas tank. I guess I should have ordered that tank. For now im going to try it out as is, if I have a problem with it leaking I'll try plan B. Sometimes we overlook the obvious.
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Rudy-g

12-25-2012 10:35 PM

Re: Chevelle Gas Tank Swap

3 Attachment(s)

I got the tank installed with the help of my brothers and friends. It fit good didnt have to cut the sending unit just had to bend the lines in the direction the hoses will be routed.

Rudy-g

12-28-2012 09:05 PM

Re: Chevelle Gas Tank Swap

3 Attachment(s)

After mounting the gas tank to the frame, the new obstacle is the filler neck. It needs to be shortened about 5 inches maybe 6.

Mustard72

12-28-2012 09:29 PM

Re: Chevelle Gas Tank Swap

So in looking at those pictures, it doesn't appear as though the Chevelle gas tank would work with the auxilliary leaf spring (on coil spring pickups). On my C20, the aux springs attach to the outside of the frame rails, and it looks like the 'velle tank extends beyond the frame rails. Is that true?

Nice write up, by the way.

Rudy-g

12-28-2012 09:37 PM

Re: Chevelle Gas Tank Swap

I believe this chevelle gas tank may only work on short wheel base trucks that have the coil spring rear suspension, becuase it is wider than the frame.

They may work on the long wheel base trucks with either suspension.

The chevelle tanks I had seen installed were on long wheel base trucks, I ordered mine and then realized I might have screwed up. I got lucky and it fit tight but good.

I went with this gas tank because its the easiest and cheapest route I could think of. Im still working on it, but so far I'm happy with the results.

Rudy-g

12-28-2012 10:02 PM

Re: Chevelle Gas Tank Swap

2 Attachment(s)

bigger pic of the tank

Rudy-g

12-28-2012 10:03 PM

Re: Chevelle Gas Tank Swap

You guys interested in this swap,

I used all pre-existing holes on the frame, except for the two I made on the rear cross member for the two bolts.

k_n_browning

12-28-2012 11:04 PM

Re: Chevelle Gas Tank Swap

I know that I am.

67anthony

12-28-2012 11:28 PM

Re: Chevelle Gas Tank Swap

Looks good very interested .

70blackfish

12-29-2012 12:47 AM

Re: Chevelle Gas Tank Swap

looks good....

Rudy-g

01-09-2013 12:20 AM

Re: Chevelle Gas Tank Swap

I started up my motor, the fuel sending unit works at least up till this point.
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Ironangel

01-09-2013 07:35 AM

Re: Chevelle Gas Tank Swap

I'm liking it alot, except for one thing...When I nail it off the line, is any fuel going to leak from that neck & cap?

Rudy-g

01-09-2013 02:55 PM

Re: Chevelle Gas Tank Swap

I am actually going to use a newer fuel cap assembly i picked up at a junk yard I'll post some pics.

A friend of mine suggested fixing the filler neck so that you can fill it from inside the bed, If I have any problem with fuel leaking out, I might route the filler through my bed.

The member whom I got this idea from, says hes happy with his setup, although hes not running EFI and has a nonvented gas cap.

Something else one could try is fuel cell foam, maybe?
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luvbowties

01-09-2013 04:30 PM

Re: Chevelle Gas Tank Swap

A friend of mine suggested fixing the filler neck so that you can fill it from inside the bed, If I have any problem with fuel leaking out, I might route the filler through my bed.

The member whom I got this idea from, says hes happy with his setup, although hes not running EFI and has a nonvented gas cap.

Keep in mind the possibility of installing a breather on top of the tank AND running the non-vented cap.
Love the looks of this tank. Neat install!
Sam

Rudy-g

01-09-2013 05:25 PM

Re: Chevelle Gas Tank Swap

Well you can order a vented gas tank from rock auto, don't know why I went with this one?
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scott-wisc

01-09-2013 06:10 PM

Re: Chevelle Gas Tank Swap

1 Attachment(s)

Vented gas caps have a check valve built in. Air can go in, but not out. If you have gas coming out of your cap, replace it.

This is a '69 Camaro tank with 3" spacers.

Rudy-g

01-09-2013 09:43 PM

Re: Chevelle Gas Tank Swap

Thanks for that info, that's why I love this forum.
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hugger6933

01-09-2013 10:16 PM

Re: Chevelle Gas Tank Swap

Forgive me if this has been covered as I have done something I never do. I have skipped to the end of the thread without reading it. I just wanted to let everyone know that if a Chevelle tank will fit, The Impala tank [like one from a SS 94-96 with the LT1] will fit as it is the same dimensionaly. I uesed one on my 68 LeMans convert when I went to the 6.0 LS1. Once again hope this may help someone and sorry if it had already been covered

Rudy-g

01-09-2013 11:15 PM

Re: Chevelle Gas Tank Swap

94-96 impala tank is 23 gallons the chevelle tank is 20 gal.

I didn't know that those cars filled from the back. I've got mine setup, it works and very affordable.

I'm thinking about a second build, so I'm going to research this impala tank.
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jks67ss396

01-10-2013 06:55 PM

Re: Chevelle Gas Tank Swap

Concerning the 94-96 impala tank (and not to hijack this thread)

I think the impala tank has a big hump on it. Seems like the chevelle guys just cut a hole in the trunk to make room for the hump

http://www.chevelles.com/forums/show...=123036&page=2

seems like from Rudys pics, there might be room up in the frame to accommodate the hump. im going to a junkyard this weekend to try to pick up one for my 5.3 swap.

didnt mean to hijack! this is a great thread!

rogergodding

01-24-2013 11:45 PM

Re: Chevelle Gas Tank Swap

Any updated pics Rudy? Just ordered a chevelle tank for my son's lwb 72...

Rudy-g

01-25-2013 02:10 AM

Re: Chevelle Gas Tank Swap

I'll post some pics pictures this afternoon sorry been on vacation.
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Rudy-g

01-25-2013 02:33 AM

Re: Chevelle Gas Tank Swap

1 Attachment(s)

Here's what I ended doing with the filler neck, used one from a newer gm truck, got it at the junk yard.
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Rudy-g

01-25-2013 02:44 AM

Re: Chevelle Gas Tank Swap

I got my engine started, 2005 5.3L/4L60e
I did my own wiring harness using LT1swap.com and had the ECM reflashed
I'm happy to report that it started right up and sounds great, the chevelle tank sending unit works perfectly.

Total spent
$1300 motor/ trans
$180 Motor mounts
$125 trailblazer ss exhaust manifolds
$85 ECM reflash
$550 chevelle tank, tank straps, fuel filter, high pressure fuel hoses and fittings
Feeling of accomplishment pricele$$
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