ok so i keep on posting bout my alternatior and i told my dad i was going to pay for it to get fixed but hes stubborn and wants to do it himself and im afraid hes going to mess something else up so me and some buddys are going to try to beat him on changing it. What would you rate the difficulty of this job from a 1 to 10 scale?

 

It's probably about a 6. Here's a write-up on what it takes to DIY.