'94 LT1 engine putting into '71 Monte Carlo

I want to use the computer to control engine and trany only. What do I need to pull out of the Buick Roadmaster to make it work in the Monte?

Thanks

You'll need the PCM IF YOU PLAN ON ORDERING A STAND ALONE HARNESS, and the complete harness, if you plan on tackling the wiring yourself

If I use the Roadmaster's harness what do I plug in and what do I leave out?

You should go check out thirdgen.org look in the engine swap forum pretty much all the info you need is their. Also check out shbox.com you should proly just book mark that site trust me.