get springs from jamco suspension. They should have the front and rear for your car. They should also have shocks to match the springs. I totally recommend them. They make drop springs from cars in the 40's until i think the 90's. I just installed some springs from there on my 46 fleetmaster. You can choose a drop from 1-3inches in the from and i think 1-4 in the rear.

http://www.jamcosuspension.com/