Ok my problem is that Ive got a 95 bonneville with a 97 series2 motor, Ive been having problems with my ecm failing and ive finally tracked it down to a bad fusable link in the power wire running to the altinator, my question is do I need to have that fusable link in the power wire? I went to the bone yard ( cause none of the parts stores seem to carry one with the link in it) and all the other series 2 motors didnt have that link on them. So do I really need it or can I just buy a regular power wire?

fusible links are only there to break the connection of too much power is flowing through them....

i don't know how much room you have to work with, but i've used a distribution box with a couple of 30-50 amp MAXI fuses to get just above the rating of my alt, so if there is a massive surge due to say a short, they blow and i'll be able to EASILY replace them, compared to having to chop out the link, get another, solder it in, then reheatshrink the damn thing, compared to finding the short, fixing it, and then popping in another fuse or 2 or 3.

X2 just run a 4 gauge power wire, cut it in half and install a inline fuse holder or circuit breaker just like a car audio system

While not completely necessary, fusing the power wire does give you peace of mind knowing your covered IF anything happens to the wire. Also make sure you put the fuse as close to the battery as possible, as the other side of the wire will not be live as soon as you shut the car off.