Also, too much amperage from the alternator will not overcharge your battery, an alternator only charges when current is needed (unless it is bad), so get the largest one that fits and you can afford.
If you do change the alternator, don’t forget you need larger cabling from the alternator to battery and a new larger grounding system all based on the alternator output amperage.
A new power wire to the starter via the solenoid and a new but extra ground wire from the starter mounting bolt to the battery.
The new wiring for the starter reduces the work the starter has to do getting power and looking for a ground to return the current to the battery, lets the starter run better and last longer.
4x4, 5sp, Std Cab, Stepside, E4 Red
4” Lift - Coil-Overs, 6” SkyJacker Leafs - No Blocks (Mistake)
31 Spline FX4 Rear Axle, 4.56s and OX Locker, Hurst Shifter w/Optional Stick and "Made by Grev" alignment adapter