Here is the Datsun factory service manuals (FSM's).
zerothread/379438 It is the same as the sticky, I just posted it for ease of navigation. Step by step instructions should be in here.
You might need to buy some tools and rent ones you don't need to use more than once. I know Autozone and other places rent tools for free, you just pay a charge that you get 100% refunded when you return the undamaged tool. I don't know, though, it depends on what kind of tools you already got.
I would not want to pay 700 dollars just to find out that something else was wrong. Hopefully nothing is, but don't get discouraged just yet. I would rather you do perform the job youself.
If you lived closer I would probably help in person.
Another edit. The one thing I can see messing you up is rusted/oxidized fasteners that just shear off as soon as you torque them. WD40 is your friend. Proceed with caution, extracting broken bolts is something else entirely.
Modified by seang at 11:17 AM 3/4/2010
Modified by seang at 11:21 AM 3/4/2010