I have a set of Motive Gear's F880380 Ring and Pinion gears, still in box with instructions (which are 3.80, used on a Ford 8", Mustangs 65-79). They are in excellent shape, I only used them on my 66 GT coupe for about a month. Yes, I am losing money by selling them this cheap, but my loss is your gain I suppose.
If you are intrested in purchasing them or have any questions, or if you would just like to see pictures of them please email me at firstname.lastname@example.org
I am asking only $50 for them, which is a deal of a lifetime, because brand new they go for about $200.
Shipping is determined by zip code destination.