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Fuel Tank Replacement.

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CoffinMaster View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote CoffinMaster Quote  Post ReplyReply Direct Link To This Post Topic: Fuel Tank Replacement.
    Posted: Sep/24/2018 at 2:12am
Just to inform anyone who is wondering about switching gas tanks, just tonight I replaced mine and it worked great. Spectra AMC 1 Tank, ST103 Tank Straps, new fuel sending unit from American Parts Depot. Had to grind down the pegs in the ends of both straps to fit into the slots, and couldn't use original J-Bolts since they were not long enough so went to home depot, bought 5/16 12" threaded rod, bent it and put a washer and nut on the end, worked great. Will probably weld the nut on the end to make sure it never slips, but all in all, new 22 gallon tank lookin good. Now I have to go about selling the old tank, and I could give the old straps and bolts with it!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote turbo Quote  Post ReplyReply Direct Link To This Post Posted: Sep/24/2018 at 8:20am
Now let's see if your fuel gauge is accurate.  That's the real test.
they call me Capt RETIRED!
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White70JavelinSST View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote White70JavelinSST Quote  Post ReplyReply Direct Link To This Post Posted: Sep/24/2018 at 10:06am
Which car do you have?

A Javelin or ??

Near as I can figure, the tank fits a lot of later built AMC's but doesn't fit Javelins very well unless heavily modified....
70 Javelin SST, second owner, purchased 1972
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CoffinMaster View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote CoffinMaster Quote  Post ReplyReply Direct Link To This Post Posted: Sep/24/2018 at 10:24am
I fit it onto a '73 Javelin. I had to modify the straps by grinding the pegs to fit in the slots and I had to make my own J bolts since the originals weren't long enough, and I had to get a 3 foot long vent hose since on the AMC 1 tank it comes out on the other side. It sits a bit lower but still above the differential and with the new wheels and tires and I don't think it will scrape if I go over a bump, but if so hopefully I can fix it with new leaf springs and shocks.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 304-dude Quote  Post ReplyReply Direct Link To This Post Posted: Sep/24/2018 at 10:26am
I think moparguy did the amc1 in a 70 or later Javelin. I think the main issue is the filler neck is centered, so a cut out may need to be done to allow it to fit, or a customisation of the tank to allow offsetting the neck placement, with cutting and welding.

Also the strap bolts have been sourced by using common hardware long bolts. There a link on making a set for tank installation.
71 Javelin SST body
390 69 crank, 70 block & heads
NASCAR SB2 rods & pistons
78 Jeep TH400 w/ 2.76 Low
50/50 Ford-AMC Suspension
79 F150 rear & 8.8 axles
Ford Racing 3.25 gears & 9" /w Detroit locker
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CoffinMaster View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote CoffinMaster Quote  Post ReplyReply Direct Link To This Post Posted: Sep/24/2018 at 10:30am
Hmm, last night I had no trouble centering mine, once it was in place I lined it up with the filler neck and raised it a bit more, then got the straps and it was fine.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 1968Javelin343 Quote  Post ReplyReply Direct Link To This Post Posted: Sep/24/2018 at 11:56am
How did you attach the filler neck?
Bryan
1968 Javelin 343
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CoffinMaster View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote CoffinMaster Quote  Post ReplyReply Direct Link To This Post Posted: Sep/24/2018 at 12:41pm
My Filler neck lined up just fine, when I dropped my old tank the filler neck was held in place by the 2 screws in the trunk, and the filler neck Grommet, and when I put the new tank in, I put the filler neck in first and just raised the tank until it was close enough to line up, and once it was lined up with the filler neck I put the strap on and they lined up too. As far as I saw everything about it was centered, the filler neck placement, the hole in the tank for it, and the straps were right in place.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Red Devil Quote  Post ReplyReply Direct Link To This Post Posted: Sep/24/2018 at 1:03pm
Later Javelin, Hornet, Concord, Eagle (not SX4) tanks are pretty much identical on top. Vent line locations differ. 73/74 Javelin have a push-in filler neck, so easy to fit. Early Javelin filler necks are brazed/soldered, so likely need a later filler neck or braze yours into new tank.

I have used the Spectre AMC1 in a '73 Hornet, '74 Javelin, '78 Concord, '81 Concord. Relocated vent line to suit with later straps and pickup. Late pickup sending unit may not work with early gauge. On the Hornet I swapped in a later gauge. For the Javelin, I swapped the sender resistance strip with the stock one.

If replacing the tank and considering an electric fuel pump in the future, good time to modify the tank for an internal pump before filling with gas.

Hope this helps,RD.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jpnjim Quote  Post ReplyReply Direct Link To This Post Posted: Sep/24/2018 at 2:52pm
I bent up some carriage bolts to replace the tank bolts on my Javelin.

71 P-code 4spd Javelin/AMX
some Jeeps and some Fords
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