Hey Seon. When the guys at thr wrecker pulled the engine for me, they knew it was goin' in a hotrod, so they disconnected as few things as possible. The engine, with computer and wiring was all one package, so it's just a matter of dropping it in, putting your computer where you want it, and making some sort of organized path for all the wires, which there isn't a whole lot of anyway. I got a 700r4 from an 88-93 pickup so it still has the speedo cable, but there's just a little white plug hanging off the engine wiring harness that plugs in the trans to control the lock up converter. Pretty easy swap altogether. Have fun.
