Bushing or Bearing?

I'm getting ready to install my 340 into my Dart and I'm wondering if I should use the stock pilot bushing or use a roller bearing. The 318 that's in the car now didn't have the crank drilled for a bushing so I just used a roller bearing instead but the 340 that's going in had a 4 speed on it so it's already got the crank drilled and there's still a bushing in it. Should I just replace the stock bushing and go that route for $3 or is buying another roller bearing the better way to go?

What would you guys do?