Need to go with a 130 amp alt.

[Mustang_289]

We went with the PA-PERFORMANCE 130amp upgrade, very happy with it - plenty of amps, great support, lifetime warranty.

If you change the connectors on the alt, which Ford did on later models to reduce risk of fire, and use 4gauge to battery with inline fuse. No worries about something burning up. Think about it - you're going from a 60Amp alt to 130Amp - requires bigger wire to handle extra current. If you don't change this wire - you're running the risk of stock wire melting and catching fire.