Swap engines, how to advice, please

[cfan10]

I'm wanting to do a swap of my 305 v8 to vortec 5.7, what will I need from donor vehicle besides engine wiring harness, ac compressor.

Will 5.7 bolt up to tranny. I just want better mpg and hp. They also seem to be mostly troublefree. Friend's mechanic will most likey do the job, as he swapped her engine out in a few hours. Mine should be a week, maybe?

Anyone did the swap before advice/troubleshooting possibly pics. Any help will be great, and sincerely appreciated.

Current specs:

84 shortwide
305 v8
Edelbrock 4 barrel carb
True dual exhaust
Auto trans/not sure which one though

Can engine come from any 90's and up 5.7 gm vehicle? Thanks, again.
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