hey im in communication with mike from mikesaltenators for an alternator for my 2008 g35x 3.5 but its not the easiest to get a hold of him. He sent me an invoice to pay the full $407 or pay $50 now.. Can you tell me whats the build time to get it to me and will I need to make any modifications like a smaller belt or is it bolt on? also how do the payments work ? full amount has to be paid or I can pay it with time.. Thank you