Lmc under bed tank?
 

Lets see how you mounted yours! I don't like the way the straps are so short so I'm thinking of something different...
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Re: Lmc under bed tank?
 

I don't have photos but what I did on my 64 stepper is as follows: Removed bed and trimmed the cross bed piece as necessary to clear the tank. Drilled holes through the frame and tack welded four 1/2" bolts for the tank. I cut a piece of an old tire, 1.5" by 12" to fit over the bolts. Then used the piece of tire as a vibration tamper and double nutted the tank under the frame. BTW I had to bend the top of the frame rail to accomodate the filler hose. I will post photos after my grandson is born. Wife has the camera and is with our daughter playing the waiting game.

Re: Lmc under bed tank?
 

So you did the 21 gallon? I bought the 17 and it lines right up with the holes in my frame already. I didn't want to mess with a filler tube and stuff so straight through the bed for me. I look forward to seeing pics. Congrats on the grand kid also...
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Re: Lmc under bed tank?
 

I used one of the pop-up motorcycle tank fillers on the side of the fender. I used some old 1.5" exhaust pipe and some flexible hose from Lowes to make the connection to the tank. It turned out pretty good. Now all I have to do is run some of the fuel out so I can make the connection to the new tank. And thanks for the congrats. Our daughter is only 5 hours away so I am ready set waiting for the call from my wife.

Re: Lmc under bed tank?
 

We used the 21 gallon blazer fuel tank, we did not want to use the side filler neck either, so we took the filler neck from a 91 blazer and welded it into the bottom left (top) of the tank, filled in the old filler neck , mounted a in the tank fuel pump for TBI and then cut the hole in the floor to fill the tank. Here are the links and details:

start of process--drilling hole and getting ready to install new filler neck:
http://kieth.smugmug.com/Trucks/66-G...t3RHj&lb=1&s=A

after mods:
http://kieth.smugmug.com/Trucks/66-G...TFcBh&lb=1&s=A

installed in floor of bed:
http://kieth.smugmug.com/Trucks/66-G...0690&k=5cxcPkV

Look around in the build and you will see more details scattered throughout.

:gmc2:

Re: Lmc under bed tank?
 

Update!!! Got the tank in filler neck modified but my next issue is what to do on the vent line!
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Re: Lmc under bed tank?
 

Since my filler cap is non vented I used a cheep fuel filter. I put about a foot of hose on the tank with the filter on the other end and tucked up out of the way of wheel splash.

Re: Lmc under bed tank?
 

Does the bed have to come off to mount the tank? Or can it be installed with the bed in place?

Re: Lmc under bed tank?
 

Tank goes on the bottom side of frame so having the bed in wont hurt me. I actually will probably have to drop the tank to mount the bed floor
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