rear leaf springs

Sure, they'll bolt right in and work on the street. The ride will be stiffer and they'll raise the back of your car - and the back bumper won't be level.
What is your car's purpose? Strictly street or street/strip?
If strictly street, you may be better off using a matched pair of HD leaf springs from ESPO

http://www.springsnthings.com/leaf-spring.htm

My car is strickly street use. The reason I'm thinking of these springs is because the price is right and they are for sale locally, so no shipping costs involved. Besides all of that, I'm old school and like the back of my car to sit higher than the front. Something like the way our cars would have sat in the 60s and early 70s. To me my car is to low in the back.