I am going to get the marling sas kit as soon as I get enough money saved up for the front of the truck. I have an isuzu pup truck from the 80's that I was wanting to use the spring leafs out of it. I am going to run 3 inch blocks and 2 inch lift shackles, until I get springs for the rear. is it possible to make a flexy leaf pack out of the isuzu leafs and get at least 3 inches of lift. I figured they would flex good, because the isuzu is 2wd?