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Old 02-09-2019, 01:02 PM   #1
Missyblue
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under bed had tank with license plate fill??

hey I am planning on moving my tank under the bed and i have seen some guys do a license plate fill instead of the bed. any of you done that? advice? pros and cons? not opposed to the bed but really liked the license plate idea. just wondering if there's a reason why I have only seen it a few times. 60's impala and 70 camaro gas tanks are what I had seen with the license fill used in a few examples I had found on these trucks. amd i am not bagging the truck or anything so i will have more clearance if that makes a difference. thanks for any help

Last edited by Missyblue; 02-09-2019 at 01:23 PM.
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Old 02-09-2019, 01:44 PM   #2
PDW HOTRODS
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Re: under bed had tank with license plate fill??

The problem with that is the filler needs to be higher than the gas tank. I used a Camaro tank on a 47 Chevy truck and made a gas door in the rear panel and I ended up having to make a new tailgate shorter to clear the door. It was not worth the trouble. The other option was to have the gas tank hang lower. The bottom of the rear panel would be level with the top of the gas tank.
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Old 02-09-2019, 02:39 PM   #3
nvrdone
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Re: under bed had tank with license plate fill??

I tried that and all ways had a hard time filling the tank. also, fuel all ways leaked out of the filler.
I finally had the tank modified so the filler neck goes out the left side above the frame rail
and the cap is in the left fender
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Old 02-09-2019, 02:52 PM   #4
dsraven
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Re: under bed had tank with license plate fill??

anybody ever tried an s10 blazer tank in the rear of a 55-59? top fuel pump, side fuel fill. 20 gallons. don't know dimensions though. would leave room for inline filter in the area of the cut off corner possibly? dunno. originally probably was there for exhaust clearance?
https://www.amazon.com/Gallon-Chevy-.../dp/B077JF6CH9

you could use a fuel door or blend in the original filler with rubber grommet in the rear fender for easy fill and no run-back on acceleration. depending on the fuel system, if you need a vented cap, it can always run out those low filler styles that are almost even with the top of the fuel tank. on a hot day a full tank of fuel expands to spill out as well. sure, you get used to it and don't fill the tank to the top, but why not just build it different to not have the problem in the first place. the same for the filler in the box floor. it's great if you KNOW you will never carry anything. if you do it kinda sucks to move stuff just to access the fuel filler.
just my opinion, doesn't mean much.
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Old 02-09-2019, 04:31 PM   #5
mr48chev
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Re: under bed had tank with license plate fill??

Remembering the cars that had behind the plate fillers in the late 50's and early 60's every time you fill the tank and park with the nose up a slight incline gas runs out the filler and onto the ground.

That might be handled by using a sealed cap and venting the tank to an outlet up high enough that it would't be an issue.
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Old 02-09-2019, 07:40 PM   #6
2solodrifter
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Re: under bed had tank with license plate fill??

I've done a behind the license twice now without a problem. First one I did was a 66 chevelle vented tank on my 54, and the current one is a 69 camaro unvented tank on my 52, which is a better fit. In 69 the camaro tank filler was changed a little maybe to fill better, and as long as you use the correct cap there are no leaks.
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Old 02-10-2019, 11:21 PM   #7
e015475
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Re: under bed had tank with license plate fill??

2solodrifter - I have a roll pan and a Camaro tank too. Really like the rear bumper. What is it from? Can you post a few photos of the bumper mounts to clear the roll pan?

Sorry to hijack the tread, but I need to know!
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Old 02-11-2019, 12:17 AM   #8
2solodrifter
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Re: under bed had tank with license plate fill??

e015475- Hey, I like the colors on your truck. My bumper is 54 chevy or gmc with stock brackets. I slid the bumper in 3" by drilling 2 new holes 3" forward in frame on each side, also had to grind off a couple of rivet heads. Doing this allowed the curve of the bumper brackets to clear the roll pan like it was made for it. I have a picture that is hard to see it, but i'll look for more pictures.
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Old 02-12-2019, 09:45 AM   #9
Slammo
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Re: under bed had tank with license plate fill??

2solodrifter: Great idea with the license plate fill!
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