LS swap project "hold my hand"

[class01]

Hey guys im about to start my swap. Putting an L76/6l80e out of a pontiac G8 into my 72. It will be a while until I start the actual install into my truck because im doing the DOD delete and cam install first. As the title says im gonna need you guys to hold my hand through this. Ive never done anything major like this. Where is the best place to get my harness and computer done? Motor mounts/stands?