Sorry guys just looking for some quick answers. I'm going to replace my drive shaft, and my rear end. With the drive shaft I am looking at a aluminum one on a.m. are that much gains from this or would a shaft from Craigslist or junk yard be fine? Also I haven't done much research on the rear end as far as what is stock. Any suggestions on what I can replace it with. I'm just looking for minimal power gains nothing crazy. Any help will be appreciated.