The E-Tec heads arent as great as Edelbrock makes them out to be. They fine but they're not good. My dad went 12.80 @ 107 with those heads and SLP runners in his '90 Trans Am, at 3000' density altitude.
You could use stock runners with a Vortec TPI base but you'll severely limit your power above 4500 rpms. A 383 with a long runner TPI is a bad idea in my opinion, because the TPI already gives you awesome torque, and the 383 just multiplies that. You'll have a car that will roast the tires from idle to 4000 rpms, and then fall flat. What you really want on a 383 is the Holley Stealth Ram. Short intake runners plus 383 torque is a much better combo.