I would consider a bolt on job max of about 5hrs and thats being nice...except for headers swaps
disconnecting all the hoses, electricals and un-bolting engine mounts then hoisting it out would take more then its fair share of time, and thats the easy part. put in the new engine, and putting it back then seeing what you missed, putting oil, bolts in, hoses in, eletrics..
almost anything can be considered bolt on
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