Sway Bar Question?

I am planning on buying Front and Rear sway bars for my 73 Duster. It is mainly a street car that sees some time at the drag strip. I was just wondering if anyone had any recommendations for good sway bars. Also I have heard that the bigger the bar is the better it is, but is there ever a time a sway bar can be to big? Also if the car is not going to be raced on a road course does a bigger bar make that much of a difference on the street? I have been thinking of going with the biggest bars that they have for a Duster, but I wanted some opinions first. Thanks

Seth