What are (if any) the benefits of a 350 over a 383? I see many people with 350's bored .030 over and wonder why they wouldn't just stroke it for the extra displacement.
I am about to begin building a 383 and just wanted some input on the pros and cons of either engine.

 

Stroking to 383 involves the .030" overbore, new crank, and new pistons. Unless the crank is internally balanced, you'll need externally balanced damper and flexplate/flywheel. Last I've seen externally balanced flexplates are only available in 14" diameter, vs. the 12-3/4" of our 3rd gens, and moving the starter out to accomodate that causes header interference problems, so a ministarter is often required. Stroked engines require grinding on the block oil pan rail to clear the rods, and often require a small-base-circle cam as well.

In case you haven't picked up on this yet, a 383 is hardly a free lunch.

The pro is it will have a good deal more power than a 355.