This might be a really dumb question, but my buddy has a 99 z24 and has the AEM alternator pulley for it but is not going to install it. He said he would sell it to me but i have a 03 LS Sport. The bolt looks the same size and all but im not sure if it will work. Just looking for some honest answers because if i cant get an answer, im just going to have to pass. I would hate to screw up my car.
 
if you cant get it for less than $50 i wouldnt even bother. 
if your car is a fully loaded auto i wouldnt even bother. 
i do believe it works though so up to you. not 100%...  im sure others will know. 
 Underdog Racing
Underdog Racing
 
It will fit just fine, and I have no idea on belt size.
PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
 
Thanks for the input, im gonna pick up the pulley. Just gotta figure out which belt. Shouldnt be a problem though
 
When me and misnblu figure out the belt size, i will post up part number