Well once again, it's been quite a while since posting. This is what has happened in the Big Tex Garage.
The truck ran well with the 350/350 combo. However, I was never really satisfied with it. I told my wife, I love how the truck looks, now I just want it to run as well as it looks. I began studying the LS swap forum on here, and pulled the trigger at the end of 2017 on purchasing an LM7 5.3 from an '01 Yukon.
After seeing Zoomad and Larry paint up the 5.3 they stuffed into Zoo's K5, I knew what direction I was going. This is right before the real fun began.
I started removing the 350 in January and had the 5.3 in and running by May. This was working on it an evening or two during the week, and most Saturdays. I tried not to let it interfere with the family.
I could not have done it without this forum, Brendan at LT1swaps.com and the info he has there (he did my ECM flash), and the Facebook group LS Swapped Square Body.