[Zoomad75]

I' m not familer with the older stuff, but if you stayed with the stock springs up front it sounds like you went from a spring under setup to a spring over setup. Meaning your stock 2wd solid axle had the spring running under it and your new 4wd axle has the same spring sitting on top of the axle now. Thats the only way you could gain lift with the same spring.

The rear may already be a spring over axle setup in which your only option for lift is more arch'd springs or blocks with the stock srpings. If you don't want to run blocks you would have to get springs made to gain the lift.

If the rear springs currently run under the axle, you could go with converting it to a spring over setup by welding new spring perches to the top side of the axle. You will gain lift equal to the difference in the spring mounting points from under to over. Might not be 6" but it depends on how tall your new spring perch is.