I quit doing them from the top about 6 years ago
from the bottom they go in fully dressed , headers on Alt water pump even fan belt & power steering is all assembled , I install the wiring on the engine as well , & usually the carb , it is so stupid simple , not scratches in the engine bay or on the fenders , also by removing the K you can detail the suspension & check for worn parts which are simple to replace on the floor . I will take pix when I put mine back in . The last customer I did it for I talked it over with him & he decided to try my way , about 1 hour later when the engine was in place he told me " you have to be more forceful about doing it this way " he was blown away at how smoothly & fast it goes in , I had just agreed to do it which ever way he chose