1966 Chevelle Build-up plan

[KCorona]

awesome, I have a friend who owns a wrecking yard so I am going to call upon his help. With the installation of these LSx's (retrofitting them to muscles) are there any special steps needed for installation? For instance, if I were to be able to get a wrecked 2000 camaro, does the wiring harness come out of that straight to the chevelle? This efi stuff is confusing to me