PEAK PUTTERS

I was wondering if this would fit my Toyota. Im thinking this is from a 2wd Toyota becuase of the gearing. I bought 5.29 gears about a year ago and have been wanting to put them in. I was also thinking about getting a locker for the rear, but I don't want to spend a large amount for it. So any suggestions/help would be greatly appreciated.

Heres the link to the 3rd member I found.

http://kpr.craigslist.org/pts/2006508621.html

Thanks
Justin

Forgot to mention, my truck is 4 banger with stock axles.

3.90 gears came out in 79-81 4 speed trucks because they lacked the 5th gear overdrive. It is a direct interchange with all the later 4 wheel drive stuff no worries.