ls1 s10 alternater question, plz help!!!!!

i need some help on my truck guys! i have an ls1 in my 88 s10. the problem i am having is with the alternater. the origanal one smoked the regulater when the power wire acidently grounded out. i have put 4 on since ( Auto Zone ) and they do not last longer than a day or more. my question is, there is only 2 wires to hook up. according to my diagram, one goes to the battery and the other one goes to key on power. i have done this same swap in a monte carlo ss and have the wires hooked up the same way, and never once had a single problem. are my auto zone alternaters junk, or am i missing something here? i am just short of taking the alternater off of my 98 camaro ss and putting it on and seeing if it works but i dont wanna blow it up either! btw, the truck is 100% painless wiring, from the engine harness to the dash harness, so i dont think there is any issue there. any help would be greatly appreciated. thx in advance.

Mike

I would start by giving painless tech a call and ask what their reccomendation is ?

after the 4th A Z alternater, i put on a new GM. works like a dream!