1970 Mustang fuel tank

[bmar]

I took off the temporary fuel tank as I was tired of looking at it. I also couldn't afford the custom tanks at almost $500.00, with shipping. I saw this option on this site and decided to go ahead with the change-over. The tank cost $150.00 with shipping and was off of Ebay. I went with the Canadian manufactured tank for a few dollars more because it appeared to be of far better quality. It is a tank for a 1970 Mustang/Cougar.

I had to fabricate the rings and cut an opening for the fuel injection. I did bolt on the rings instead of welding. I also had to trim back the frame rails for about 10 inches to make room for the tank and also move the cross-members.

Since I had to move the crossmember that the shocks use to mount on, I went ahead and moved the shock mounts as well and re-attached the shocks back to the original shock mounts.

[steve53]

nice money saver! looks like it was meant to be there after the mods you did. good job

[Tri5Nerd]

Nice mod. Looks like it will work, what size tank did you use? 20 or 22 Gallon?

Tri5

[LEEVON]

that's cool, what kind of sending unit are you using? What are your engine plans?

[bmar]

Originally Posted by Tri5Nerd

Nice mod. Looks like it will work, what size tank did you use? 20 or 22 Gallon?

Tri5

The 1970 tank is 22 gallons. The older tanks are the same size, but not as deep and they are 18 gallons, I think. I needed the deeper tank so the fuel pump would fit.

that's cool, what kind of sending unit are you using? What are your engine plans?

I had been using the Camaro sending unit as the sending unit on the fuel pump was 0 to 230 ohms and I need 0 to 90 ohms. The Mustang sending unit fit on the side of the tank and would have interfered with the fuel pump. So I combined the pump and the sending unit back together by bolting the mustang unit on to the fuel pump. I have an engine out of a 2002 avalanche 5.3L and the tranny is out of a 2003 Suburban as I didn't want four wheel drive. I posted some picture. Bill

[hotrodrookie]

Is that fuel pump out of the tahoe? Does it fit inside that tank?
I have a fuel pump assembly out of a ls1 camaro but it doesnt compress enough to fit inside my tank that I built (its 8 inches in height), im also doing a 5.3 swap in my truck.

[bmar]

Originally Posted by hotrodrookie

Is that fuel pump out of the tahoe? Does it fit inside that tank?
I have a fuel pump assembly out of a ls1 camaro but it doesnt compress enough to fit inside my tank that I built (its 8 inches in height), im also doing a 5.3 swap in my truck.

The fuel pump isn't from the Avalanche. I didn't have the wiring harness for the Avalanche pump and I couldn't fine a connector that fit. So I ended up buying another pump. The Mustang tank is 9.5 inches and the pump is 10 inches, but will compress about two inches. There is a depression in the middle of the tank, where the float of the fuel gauge sending unit would normally sit, and the fuel pump is lined up with this. Also, the rails on the fuel pump can be shortend. This fuel pump came with the rails several inches longer than I needed. If you look at the plastic hose from the pump, you can see it is longer than is needed and is curled up inside. Bill

[Tri5Nerd]

Originally Posted by hotrodrookie

Is that fuel pump out of the tahoe? Does it fit inside that tank?
I have a fuel pump assembly out of a ls1 camaro but it doesnt compress enough to fit inside my tank that I built (its 8 inches in height), im also doing a 5.3 swap in my truck.

It fits inside the 22 gallon tank with little compression on the springs. I'm using this setup now.

[hotrodrookie]

I picked up a spare ls1 pump assembly for free that was bent in the rods and has a few broken plastic parts but Im canabalizing it into its basic parts to make my own assembly out of it similar to the tanks inc pumps. When I get around to it i'll post some pics.

anyways, do you know in the sending unit on the ls1 pump would be 40-240 ohms?
can i buy a traditional fuel gauge for it?

[bmar]

I couldn't get the sending unit on the fuel pump to work with my gauge. I remember the sending unit reading from 0 to 230 ohms and not getting full deflection on my fuel gauge. I have a 0 to 90 ohm and it worked fine with the Camaro sending unit. I haven't had a chance to try the sending unit that came with the Mustang tank, but I am assuming it will work ok. The sending unit has to match the gauge, as well as the float arm being adjusted correctly for the tank it is installed in.

[bmar]

Spent most of the summer working on the truck. It is finally complete enough to drive on the street with out fear of being arrested. I still have wiring for the overhead console, power seat and the power windows.

[Tri5Nerd]

Good to see another TF on the road or drivable. How do it run? did you have to make any adjustments to the tank, did you have any leaks from the side of the ring on top of the tank that you made? I used some JB weld to seal mine.

Tri5

[bmar]

The engine ran fine with no problems at all. I used silicone seal on the rings and there is a rubber ring, as well as a rubber liner around the top of the fuel pump, so i have had no problems at all with gas leakage. I do need to adjust the sending unit arm as it still shows about an eight of a tank when empty. I need to get the frontend aligned as there is some wandering as i drive down the road. All in all, I have been very happy with the truck so far.