If you're going to go through the trouble of fabbing a reverse shackle on the front...
I'd be inclined to get just the 4" front Skyjacker springs. Buy two new rear spring perches and weld them to the top of the rear axle, and buy two new center-bolts/pins and replace the center pin on the rear springs.. flip the head over.. and go spring-over-axle on the rear suspension.
I run 4" Skyjackers in front and SOA w/ shot springs in the rear and my Scout sits about level. I had the 4" rear springs and 2" extended shackles for a while - but after I broke the spring perches off the axle, and got tired of the low-lift (even after the shackles) in the rear, I just went SOA.
You may need to experiment with keeping the shortest leaf in the pack, and use some low-profile perches to keep your rear lift low if you have good springs. Adjust your reverse shackle to compensate.
You'll also need to lower the bump stops and/or relocate the rear exhaust if it currently runs out of the frame between the springs and frame - you'll smash it up. BTDT. Spring catches it between the frame n' spring.
I moved my rear axle rearward 7/8" and my 33s are pretty well positioned in the rear wheel wells.. 1" might've worked just a little better. I had my rear driveshaft retubed and lengthened about 1.75" after the change to the SOA rear.
More ground clearance, more load capacity (with my "standard" pile of parts and tools).
I do notice some wheel hop now.. but that could also be due to the new motor and lower transmission gearing I swapped in after the SOA.. and the springs I used are quite shot (I netted 3" of lift out of the rear SOA.. I had to put blocks in!).
Should cost the same as the rear lift springs or a fair bit less ($109 to retube my driveshaft w/ heavier walll and new U-joints.. I probably paid $250 for the rear springs)