Good afternoon, Mr. Kilmer. I know you are a busy man, and first of all,l I would like to say thank you for your years of experience for sharing with us. You helped me fix my old 528i BMW years ago. Recently, my uncle passed away and left me his 2003 GMC Sierra. The truck has been sitting vacant for years and is in desperate need of TLC. It currently has a 4.3 L V6, which I am in the process of swapping out due to the truck sitting up for so long. I want to restore it fully with some modern amenities and more horsepower under the hood.  The question I had wanted to ask was if it would be viable to do an LS2 swap or get a motor out of an older taho, and what's the best place I can get retro and modern-day parts for a full rebuild. 

Thanks in advance