Shopping list
I see the V8 contingent has checked in.
You will also need some adapter motor mounts for the 383, a larger radiator and bigger torsion bars. Don't forget to drill some holes in the driver side splash guard so you can change the back spark plugs. And headers are only around $1200 to get a set that actually fit.
And when you get done, you will have another boring big block A-body.
Or you could have a supercharged, EFI fueled \6. When was the last time you saw one of those at the car show...