4 speed or 4 speed OD?

I ran a OD behind a stroked 340 with 410 gears. It was great for gas millage and burn outs. Just don't make the mistake of shifting under power, they wont take it. I broke two of them going from 3rd to 4th. Got great gas millage ,Drove from LR Ark to the nats with 340 6pk,4spOD, 410 gears and got decent gas millage. I would vote go for it.