79 Mustang Gas Tank & Sending Unit

I would start with these guys

www.mustangsunlimited.com
www.cjponyparts.com
www.50resto.com

I would say any of these 3 could probably help you, I think the last one (Latemodel Restoration Supply) has the best website.

The '79-'81 tank is completely different from the '82-'85 carbed tanks, and the '86-'95 FI tanks... Unfortunately, they are not available new, and pretty hard to find used as well.

You can either have your tank lined and repainted, or use the '82-'85 or the '86-'93 tank. You will need to use longer bolts, as the straps are mounted closer together on the early cars and don't fir into the grooves on the tank.

If u use an '86-'93 tank, you will need the sender from an '86, as the '87-'95 use a different ohm rating, and the '82-'85 sender/pick-up assembly won't fit in the later tanks. You will also need an aftermarket carb-style pick-up, or replace the EFI pump with a lenght of hose if using an '86-'95 tank.