My 5.3/4L60e swap into a 96 Chevy S10 4 dr Blazer was great, trouble free for a lot of trailer towing miles. Used the stock 2005 harness which had 0 miles when received, stock PCM, removed above mentioned items, stock engine compartment fuse box and connectors with minor rewiring to supply fans and power to tranny. When the frame cracked I swapped everything over into my 68 C20 Custom Camper. Been trouble free used towing a 28 ft 68 Airstream all over the country for work. Great reliable, decent milage and power combo. Thumbs up for doing the swap if its going to be a daily driver. Good luck however you go. Jim.