which year ls? which tranny?

[bloodybigblock]

alright guys, Im trying my hardest to learn all the modern tech. and what is involved with doing 1 of these swaps. I have a 67 c10 2wd. Is one specific year better than another? Would running a built 700r4 trans be better than the electronic trans? Also is there a list of exact parts i need that i could take to the junk yard to make sure i can get all i need? I think ill find a 5.3 since 6.0s are scarce from where im from unless their is a website that will ship warrantied low miles motors with all hardware. Thanks in advance guys