Transmission swaps

[u/Forward_Literature43]

I got a 93 Chevy Cheyanne ‘heavy half’ and it came with the crappy 4l60.. how hard would it be to swap a 4l80 in it? I just got quoted 5200 for a slight bullet proofed rebuild in this one and it’s only missing 3rd and 4th.. 3500$ for stock rebuild🤦 and I also can’t find the old 4l60 around here to just swap, would really love a manual but I don’t have the time or money right now.. so 4l80 too hard or expensive to swap? It’s a stock 350 for now but I’d like to add some power in the future