My new 1974 F-100 came with no fuel tank. Previous owner took out the old tank and threw it out (along with the straps and the sending unit!! Damn him!) and connected a fuel rated hose to the mid chassis line and inserted a pancake fuel tank in the tool box (~6 gallon one for boats). I just ordered a Spectra Premium F1A along with straps and the FG73A sending unit. The truck is also missing the rubber filler hose that goes between the filler neck and the tank. Are these available? I'd figure the hose might be molded...

Also, guessing the F1A tank does not come with the EVAP fitting, but then, my truck DOES have the EVAP line running on the side opposite the fuel supply line. It had been disconnected for some time. so which fuel cap do I need with a non-vented tank?

Thanks for the help.

 

I know LMC Truck has the rubber filler hose sections for my '78. I bet they do for a '74 also. For a fuel cap on a non evap '78, I used the replacement recommended by AZ. In stock and no problems.

 

LMC also sells the rollover valve - if you get the tank, and it doesn't have the rollover valve hole, you can cut one with a hole-saw (I forget what size offhand) and then install the grommet & valve yourself. Just make sure you catch ALL of the shavings if you modify the tank.

LMC also has the fuel filler hose (it's like 2.5" or something) though you will need to get some 3/4" for the vent hose.

As for which cap you need - you need the appropriate cap for your year for a tank with evaporative emissions. Any autoparts store should be able to hook you up!

 

With Evap/Em, the fuel tanks are different than without it. Evap/Em tanks have a round hole in them at the top for the fuel vapor valve and its related gasket.

Evap/Em uses non vented fuel caps, unleaded fuel. The original non vented caps have 4 "ears" not the usual 2 ears. The original fuel filler tubes have a restrictor in them, one purpose was for the 4 eared fuel cap to twist into.

Back then, there were two different diameters of gas station nozzles, larger one for leaded fuel. The restrictors would not allow the leaded fuel nozzle to fit.

Note: As original, the fuel filler hose came with the vent hose taped to it with electrical tape in three places. If replacing, tape the vent hose, because it may collapse if not taped.

These tanks have a history of slow fill. If y'all think it's slow fill now, try filling the tank with a collapsed vent hose!

 

Try Fuel Filler Necks & Gas Tank Pipes | Filler Neck Supply Co. for refurbed filler necks.

 

so my truck came with EVAP, but i bought a fuel tank that didn't have the provision for that. I guess I need the vented fuel filler cap, but are you saying you cannot stick a vented fuel filler cap on a fuel filler neck that was made for EVAP? Are the necks actually different?

 

The cams in the caps are at different depths, so a vented cap will NOT work on a EVAP filler neck or vice versa. (I tried, I bought the wrong tank as well, based off the fact that there was no existing emissions stuff anywhere else on the truck). If you use an EVAP filler neck/cap on a non-emissions tank, the truck will draw a suction on the fuel tank, and eventually (within 1-5 minutes of running) the motor will start stumbling and then eventually die. If you open the gas cap while it's running, you'll get a big hiss of indrawn air. You could be INCREDIBLY redneck and just use a SUPER tiny drill-bit and drill a tiny hole in the gas cap. I don't recommend this - I prefer having the rollover valve!

I bought the rollover valve and gasket from LMC, and then used a hole-saw on the EMPTY tank (while it was out of the truck) and installed the grommet/valve. It works great! If you do this make sure you clean all the metal shavings out of the tank - and do it BEFORE you fill it with gas! If you don't have any other emissions equipment on the car, you just run a small diameter fuel line up the passenger frame rail to the bottom of the air cleaner assembly. Not quite factory, but it works!

HOWEVER, you could also just replace the filler neck pretty easily - if you can find one. I think once the fuel hoses are disconnected, it's 4 screws and the whole assembly comes out. Swap filler necks & caps, and reassemble. Should be able to do the whole swap in 30 minutes

-Brad

 

The problem with the filler neck swap is that my 77 (no EEC), has a different style filler neck (has a 'door' and different shape filler neck), whereas my 74 (with EEC) has no door. I could get the right tank with the hole in the top. But I think I found an easier fix. My 1977 F-150 gas cap has the deeper well cam filler neck, even though it doesn't have EEC (it was exempt from EEC and CATS based on GVW). It's also a vented cap. I just checked and it does fit on my 74. So couldn't I use the 1977 style cap on my 74?

 

...and another thing I just found out is a difference between EVAP and non EVAP trucks. The tanks and filler neck hoses have the filler and vent hose locations REVERSED! Yes, the EVAP tanks have the vent hose to the left of the filler hose; whereas the non-EVAP tank has the vent hose to the right of the filler hose. So basically, I have to run a little longer piece of vent hose so it can criss-cross the filler hose, outside the frame of the truck. I guess that's what I get for buying a non-EVAP tank for an EVAP truck.

 

so a 77 F150 without emissions will fit the later style neck? I need a vented cap to fit that style neck too.

 

No, that's not the issue/vehicle I was commenting on. I was speaking about my 1974 F-100, which is an EVAP truck. I have a cap that is vented that fits the neck (the later year non-EVAP truck caps fit, they just don't 'look' right, since they are supposed to be concealed behind a door.

The issue I had was that the EVAP versus non-EVAP gas tanks are actually different - the vent hose is on the left for EVAP and on the right for non-EVAP. Crazy and stupid **** that Ford did...

 

All 1977/79 F100/350 Stylesides have fuel doors.

D8TZ-9030-A (replaced D7TZ-9030-H) .. Fuel Cap-Vented-non locking / Use without evap/em / 2 5/8" O.D. / Handle on top of cap, zinc plate finish (Motorcraft FC-807) / Obsolete

Last MSRP: $8.67 / Dealer net cost: $3.99.

Applications: 1977/79 F100/350 Styleside mid-ship & aft axle fuel tanks / 1978/79 Bronco.

TISON MOTOR SALES in Estill SC has ONE = 803-625-2551.

DICKERSON MOTOR CO. in York SC has ONE = 803-684-4225.

HASELDEN BROTHERS in Hemingway SC has ONE = 843-558-2134.

WESLEY OBSOLETE PARTS in Liberty KY has ONE = 606-787-5293.

ANTIQUE AUTO SUPPLY in Arlington TX has ONE = 817-275-2381.

B. F. WHITE MOTOR CO. in Stanton TX has ONE = 432-756-3321.

HAVEN FORD in Haven KS has ONE = 620-465-2252.

 

Need a Filler neck for a '78 Stepside. Greyed out in LMC's catalog. Ideas?