I will say 383 because I am a big block guy. You can probably score used bolt on parts for it cheaper too. I see low deck aluminum intakes for 75 bucks all the time. Cheap summit cams, used cams, and cams people didn't decide to run.

I've never owned a 383 myself. I've been really unimpressed by some, and really really impressed by others. Make sure its got gear and its tuned well and it'll scream.

And you'll have to deal with selling the 383.

Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street