I just finished my bastard pack. For those having doubt, I have this to consider;
Many people buy Rough Country (and maybe other brands) lift kits for their Jeeps, and have issues with spring sag. Some sag sooner and other later...
Using a bastard pack gives you OE quality springs, that are likely to be "broken in" already. While the pack as a whole will likely settle some as each spring gets acclimated with the others, all of the springs are used and are not likely to change shape much.
I used the rear leafs from an Explorer Sport Trac. They were from a salvage yard, and the axle was already removed, leaving only the four leaf spring bolts for me to remove to get them out. I think I paid about $40 for them, and still have their main leaf and short helper leaf left over.
My intention was to get about 2" of lift from this swap. I also did not want a harsh ride. Bigger, thicker springs that have a higher load capacity WILL ride stiffer, so my theory was to add a *new* bigger thicker leaf, and take some springs away to equal about the same load capacity. While many are looking for 4" lift or so, I didn't want to get into SYE's or T-case drops. I already opened a can of worms with my 8.8 swap and didn't want to mess with it again.
In the front I used the stock YJ main front leaf, backed up by the sport trac's second leaf. I did not use the donor main leaf here like most people seem to do. To use the sport trac leaf, I re-drilled the center hole to the middle of the leaf. As it comes, the hole is offset towards one end about 2". In the past I was unable to drill spring steel, but using some new harbor freight(lol) drill bits, it went pretty fast. I then used the shorter YJ leaf with the spring clamps, but discarded the YJ second leaf and the shortest YJ helper leaf. The sport trac leaf is long enough to go from spring eye to spring eye, no cutting needed. I ended up with only three leaves up front on each side. I figured if I need a little more lift or firmness I will add the shortest helper leaf back in. So far, I like it how the ride is and I'm satisfied with the lift.
This is exactly how the donor sprt trac was sitting when I found it- just begging to give me its leafs!
Here is a quick shot before the lift. I have 265/70-16's for tires, so your "stock" height may vary.
And my stock bent passenger spring. I replaced it with another used stock main leaf I already had.
My "new" spring packs. You can also see how long the sport trac second leaf is in comparison to the YJ main leaf here. You can also see my leafs are far from flat now.
And finally a front "after" shot, showing about 1.75" of lift.
I'll finish/edit this post to completion later....