94 firebird 3.4 to 94 LT1 engine Swap

I just recently picked up a 94 firebird off a friend of mine and the v6 well just dont cut it so i picked up a lt1 out of a 94 Caprice now the casting numbers are the same on the lt1s i have all the wiring all of it interior wiring and the under the hood wiring came with it along with the other required components to the engine now im proly gonna put a bigger cam some headers etc before i throw it in now what i need too know is that since there the same year will i need too replace most the wires or will most of them work already i know the comp etc need changed just wondering on this wiring btw it also has the 4l60e tranny

look under this site on: Technical how to v6-v8, its a sticky that has very decent information.... thats where i would start

somethings would be like tack, speed, brackets, mouts, fuel delivery, and so forth, read the sticky