Does the 75+ tank have a drain plug? will I need a new grommet and fitting for vent? I suppose the 75+ tank is the way to go
How much you gonna pay to have 3" pipe snaked through your springs/shocks? All that stuff is springing up and down when you drive... When you go with a Stang tank, the weight is centered, the parts are going to be available forever, and you can run an 'off the shelf' mandrel bent Mustang dual exhaust kit (much cheaper than custom). It sounds like a winner to me, and everything will look 'right'...
I always just buy preformed J/U pipes and cut and weld. Or do pie cuts. My last exhaust was 60 bucks. Thats including the price of the 40 series mufflers.
No drain plug, i dont know about the vent stuff. It wasnt included but i had everything off my old tank that just swapped over. It has a vent on the top that runs a line to the canister under the hood. I dont know how the early cars have their vent systems.
I think if you use a 65-70 Mustang tank then you should vent the tank like the factory had them vented (gas cap) and not install the vapor valve. The Mustang tanks are flat on top and don’t have the expansion area at the top of the tank. Strap-in fuel tanks on the Maverick are enlarged at the top so that there is an area representing 10-20% of the total fuel tank volume above the level of the fuel tank filler tube where these gasses may collect when the gasoline expands due to heat. When I got my Maverick the previous owner attempted at installing a 65-68 Mustang tank and made a total mess of things. I was easier to use a Maverick tank than trying to re-invent the wheel. I got my new tank from Rock Auto complete with sending unit for around $120 shipped. I already had the rear valance removed before installing the tank.
I've been considering this modification too and would like to hear from as many who have done it as possible. I do understand the concern for the lack of air space in the top of the tank though. The mavericks with the valve at the top of the tank were in response to the fed requiring safety measures for rollover. The valve has a stopper in the top that prevents fuel loss in the event of a rollover and if you use a vented gas cap, it will just spill out of the cap. As one who has rolled one, my 72 comet , I am somewhat concerned about maintaining that safety measure if I'm not using a fuel safe cell.
Pics I couldnt get my camera working, but i got some cellphone pics. When i get the camera working ill post close up pics with a ruler. Anyways there is 3/4" of clearance between the tank and the valance. And 1/2" between the straps and the valance.
Pics I went to the junkyard and got the valance off a 71. I came home, sanded all the paint off and primed it. It bolted up just fine and cleared the gas tank. In this pic where the valance bends is where its stamped for the plate. Like all of them are. Last time i checked Ford never changed the body dimensions during 71-77, so my 75 shouldnt be different then any other year.
I am going with a Stang tank soley for the exhaust situation and centering of the weight on my 75. I want to go with off the shelf exhaust, placed in it's traditional place. So I don't think that the Stang tank mod should be dismissed. It is a good option/alternative to using the stock tank.
Yes... but if you do more checking, they never used the large tank with a valance. That makes a big difference. The large tank cars had more room in the back without a valance, so they used it.
I dont see the point here. If im using an early valance(i converted to small bumpers) with a larger tank. It shouldnt matter if its a 75 or a 71. Its going to fit the same. But dont take my word for it. Theres already 71-73 guys on here running the larger tank. And true Ford never used the valance with the large tank, but guess what? I AM! so are all the other guys with small bumpers on their 74-76. I guess you missed that part when you were checking.....
I do like the centered pipe look more. Plus then you can run one of those 69 stang valances with the cut outs.
Yes, and some of those folks, maybe not every one, but some had problems getting it in their car. At the factory, tolerances are considered "good" at 3/8" from car to car, so it happens when you are talking about such a tight fit. I am not saying that the stock tank is the wrong option for some folks, just posting some potential postives to consider when making the choice. Choice is a good thing.
Then you also have to take into consideration all the people who have bent Valances. I think thats where the rumor got started that the valence wont clear the tank.
