Rod Wood

Hello All I'm new here and was checking out the site to best find where to insert my post hopefully I chose correctly, I am wondering if any of you have done the LS swap into your 73-86 C 10? I live in Calif and I have 1 choice because of Emissions and that's the erod, I'm looking at the LS 3 6.2 connect and cruise, in the past I have purchased from vendors to find there kits did not come with fasteners were the wrong mounts bolts to short for the application ect. ? how was your kits did they actually fit your application? who did you purchase them from ? how was there support? Gauges where did you get your gauges for the LS, fuel tanks starters Cooling mounting anything you have will help me decide, including fuel mileage after the swap.....
Thank you all so much...…...