[MDPotter]

I don’t like wiring very much, but feel I could modify a stock harness, but I really would like to hide as much wiring as possible, and the Ecu. Also how is the original cab wiring integrated into the Ls engine harness. Many questions in the weeks ahead. Typically, the LS harness stands on its own. What we have done on our swaps is use the accessory circuits in the American Autowire Classic Update harness to power the LS harness. We have reworked the stock LS harness on both swaps. It takes time and patience but is not complicated as Brendan at LT1swap.com has provided so much information. Or, you can get an aftermarket harness that is setup for swaps already which comes with a standalone fuse block and connect straight to the battery. Third option is to buy the Holley Terminator X or X Max (X controls engine only, X Max controls engine and trans) which is a standalone harness and a PCM that learns on its own. If you want to modify the harness and mess with tuning, you can rework the factory harness yourself and get a mail order tune or take it to a shop or do the tuning yourself with HPTuners. If you don't want to do any of that and don't mind spending more, I would go with the Holley Terminator system. That's what we're using for the next swap which will be a turbo setup.
This truck is radio and heater delete, so lots of room behind the dashboard to hide Ecu? I have a center console in my truck and hid the PCM in there, but lots of guys hide it in the dash.
I like the idea of Hydro boost and electric fans. There are a few threads out there on this and I have some info in my 68 thread. Hydroboost gives you strong brakes independent of the vacuum your engine is providing and saves room in the engine bay. You don't need a high dollar radiator to keep it cool. The fans are more important - get good fans from SPAL.
What motor mounts are best and location. I used the stock perches, stock replacement mounts, and LS adapter plates. Dirty Dingo plates are nice because they slide for adjustability. My plates are adjustable in that they have 3 different sets of holes.