Re: What Spring should I get?
One thing to consider with the soft National and OME springs with a SPOA is the likelyhood of springwrap. I don't have any experience with these springs so I can tell you myself, but I recall someone have some 3 inch springs (I'm thinking that they were OME but not totally utterly positive) saying they experienced major spring wrap on their 3inch lift springs.
I don't know how much lift you need but I would lean toward the rancho leafs (flatter spring almost like stock, so less problems) or what about going with CJ front springs in the rear and moving your rear leaves up front. By adding and removing individual leaves you can fine tune the amount of lift.
Canyon State components makes a spring hangar that you bolt onto your stock hangar and lets you run the cj front springs on the rear, even has a built in spring hanger skid plate. You could move your rears up front simply by using a longer shackle get some missing link type shackles (yeah I still remember, military pay).
You can find CJ leaves for cheap sometimes. A guy offered me his front springs for 40 bucks after he upgraded to lifted springs. The Canyon State spring hanger is something like 90bucks. I'm not sure how much a M/L style front shacle setup would cost, but you could just use a longer shackle in the meantime if you can afford to get that. It will detract from you approach angle most likely because the springs will set a litte bit farther forward, but you can also fit bigger meats under there too.
88 Sammy in the garage