Im doing it in stages, im on a budget so trying to save as much as i can then go to better stuff.
There is no way this will be cheaper unless you already have all the parts. You can get full motors for ~$500 around here.. throttle body to flex plate. You can get an entire engine/trans/wiring harness/ecm for $1000-2500 depending on miles and condition. Standalone harness for an LS and 4l60/4l80 is gonna be ~$500 for a really good quality one. You only need to connect 4 wires from the standalone harness to the truck and you are done. Good luck getting some mix and match carb setup and trans controller to work worth a damn after piece meal changing everything around over the course of several years. Unless someone gave you that short block for free, I can't imagine it makes any sense to use it. Just go get a complete engine/trans/wiring/PCM for $1500 and then you don't need to mess with anything. Or engine/trans for less. Or 5.3/6.0 engine only with no harness for even less, then go get a junkyard 4l80 that has decent looking fluid for $200-400, buy a standalone harness for a couple hundred bucks and send it.
