I'm going to install an after market plastic tank behind the rear axel to get it out of the cab. I've been looking around for ideas on how to route the filler neck and can't find any pictures anywhere. Anybody done this and like their solution?

Peter

 

Check previous pages in this forum, by now someone must have done it. In the 49/60 truck forum this comes up once or twice a month! About the only way to run the filler neck is thru the box floor or the box side like Ford did on the later models. I will try mine thru the licence plate area.

 

And they said a Pinto would become a fireball in a rearender. I would feel safer with a in cab tank in a crash. JMO.
.....=o&o>.....

 

I agree that the rear end mount is not the safest for a gas tank, but at least the fireball will start about six feet behind you- instead of six inches and contained in the cab with you. Cruise a large tow yard or collision auction lot (Coparts, Veristar, etc) and check out side impacts. How well do you think the in cab tank will hold up if the side corner panel and door are pushed in one to two feet? If safety concerns are why you want the tank out, look under modern trucks for tanks located lengthwise inside the frame. My 84 Ranger tank looks like it will fit my 71 if I get creative with the exhaust. Fewer worries equals more fun with our trucks!

 

Boy, you guys are nervous. Anythings that penetrates the steel frame far enough to break a plastic tank in behind the rear axel and I want the tank as far from me as possible. The logistics of a long tank between the driveshaft and the frame rails seem impossible with dual exhaust and a divorced transfer case all taking up room.

 

If the impact is hard enough to split the rear mounted gas it should be enough to propell the vehicle out of most of the spill, though not in time if a fire starts. Better the fire ball behind then in the cab.
Either way it`s not pretty and hopefull none of us/our trucks end up this way. It`s possible but not that probable. I always try to keep an eye in the rear view mirrors but even then....

 

Look what happened with chebby and their outside the frame saddle tanks a few years ago. I was rear ended back in 72 around 45 mph by a 66 Ranchero, I had a 64 Chrysler station wagon. The tank ruptured and caught fire, Ranchero driver burned real bad, both vehicles totaled. I got the motor and trans for another project. With 34 plus years driving Bumpsides I feel safe with a tank in the cab but thats just me.
.....=o&o>.....

 

This is what I was thinking, when rear ended you are pushed away from most of the fuel spill and should be better off than the person that runs into you. Less chance of the tank being crushed in the cab but still I don`t like my 69 F100 or especailly the 56 having the incab tank. The 56 M100 isn`t as heavy built as the 69. Other than fuel cells we are stuck with gas tanks somewhere, every vehicle needs one.

 

I followed this article as a reference.... http://www.classictrucksweb.com/tech/0404cl_tank/

I'm almost done installing mine. I'm using a tank from a 69 Mustang. I've seen many of these tanks at car shows. Most use the filler in the bed floor.

 

With the spare tire under the bed in the back on the 68 CS, two saddle tanks, cab tank and dual exhaust down both sides of the drive shaft there is room for only two one gallon milk containers in size left.
.....=o&o>.....

 

I was thinking about dual tanks inside the bed. Use two "in-cab" tanks and face them opposite ways in the front of the bed. Out of the cab, not under the rear bumper, but you sacrifice like 1 foot of bed room. Good luck.

 

It would be more than a foot

 

Well, to be technical and helpful, it is 14" (two more inches than a foot) with 1/2" of space between tanks. Happy?

 

It also wouldn't be very safe, unless you built in some sort of support structure to hold them. A full 19 gallon tank at 6.5lbs/gal would weigh almost 125lbs, plus the tank's own weight. From what I have heard, a Bronco tank will fit between the framerails in the rear, and a 73-79 filler door can be patched in behind the rear axle. This system is decently safe, there will be both the bumper and a crossmember between traffic and the tank, unlike a car which might have some plastic.

 

Go to the galleries page look up 71 F250 4x4 sport custom, I think his name is Chris Ferrari, any way his page shows how he swapped the tank to the rear with the cleanest filler neck I have seen, really good job,may give you some ideas.