[Tx Firefighter]

In the front, get either a 2 or a 3 inch drop spring. That will give you 4.5 or 5.5 inches of drop depending on which you choose. I've never seen a 2.5 inch drop front coil anywhere. I like to use Summit racing springs myself. They are cataloged for 73-87, but interchange all the way back to 63. Plus, when you unbox them, they are actually Ground Force brand springs in a Summit box and no one beats the price.

In the rear, I have never seen a spring that drops lower than 6 inches. You'll need to run a 1 inch lowering block for that last inch.