[Wgesnerjr]

I bought my engine and trans from a yard and they left the center plug and cut the others as far as the could. If you are going to use the under hood fusebox, you will need the other plugs. If not, they may be useful but might not be needed.

Check this site for details
http://www.lt1swap.com/wiringharness.htm

I have been following these instructions and they have been very helpful.