There are kits to drop in your engine. There are pre-made, 3 wire hook up stand alone wiring harness for $600-$800 that can be purchased online. You can save a ton of time that way. I personally and god with tearing apart a harness, removing what not required, adjusting wire length, re assembling connectors, wiring everything require to a fuse box, etc. If you want the car running quickly just buy the pre made stuff. Elimintate many of the issues by DIY.
If your poor like me, here is a good place to start for the harness http://lt1swap.com/