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1949 3800 gas tank swap #1346480 Fri Feb 14 2020 02:08 PM
Joined: Jan 2020
Posts: 3
E
Erik Husker Offline OP
New Guy
Ok. I have a 1949 3800 flatbed truck. I am wanting to move the gas tank out of the cab. I have thrown around a few ideas for the tank location. Mount duel tanks on either side of the frame behind the cab, on the flat bed, or use a 47-48 suburban style tank and mount inside the frame. If I do the inside the frame option, will the suburban style 16 gallon tank work? I know i might have to cut a notch in the flatbed mounting board to get it to come through. I see there are 2 braces on those frames to help hold the tank Can those be found anywhere? Thanks for any help and assistance.

Re: 1949 3800 gas tank swap [Re: Erik Husker] #1346533 Fri Feb 14 2020 08:35 PM
Joined: Apr 2016
Posts: 77
A
ASU Offline
Shop Shark
This is my 48 3600 flat bed. I used a universal tank (u-4) from www.tanksinc.com. I built some angle iron brackets with a "dip" in them to lower the tank in the frame, and get the fill neck down to the top of the frame rail.
Jon

Attached Files
IMG_0118.JPG (25.6 KB, 102 downloads)
Re: 1949 3800 gas tank swap [Re: Erik Husker] #1346812 Mon Feb 17 2020 04:02 AM
Joined: Apr 2002
Posts: 1,574
F
Fox Offline
Shop Shark
ASU,
How much space will there be between the deck and the tank? By the looks of it, if it was a pickup box that tank would likely be hitting the bed wood. How much driveshaft clearance is there?


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Re: 1949 3800 gas tank swap [Re: ASU] #1346833 Mon Feb 17 2020 01:38 PM
Joined: Jan 2020
Posts: 3
E
Erik Husker Offline OP
New Guy
Thanks. Do you have any pictures of the brackets? My truck has a flat bed so i have a 4x6 attached to the frame and the box sets on top of that. I have toyed with either placing it like you did or up even higher since I have a bit more room

Re: 1949 3800 gas tank swap [Re: Erik Husker] #1346920 Tue Feb 18 2020 12:19 AM
Joined: Apr 2016
Posts: 77
A
ASU Offline
Shop Shark
I have a flat bed too, but plenty of room. not the best pics, fluorescent lights in the garage don't like the cold... Brackets mounted to cross member at the back of the cab, and the cross member just ahead of the axle.

Attached Files
front of bracket.jpeg (47.32 KB, 34 downloads)
back of bracket.jpeg (24.5 KB, 35 downloads)
top view.jpeg (65.44 KB, 34 downloads)
Re: 1949 3800 gas tank swap [Re: Fox] #1347341 Fri Feb 21 2020 02:13 PM
Joined: Jan 2020
Posts: 3
E
Erik Husker Offline OP
New Guy
The tank will be raised up in the frame since I will have a 4x6 on the frame to raise up the flatbed frame.


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