Question about Lift Blocks

[JBakerFX4]

The 3.5" blocks that came with my Skyjacker kit are "supposed" to go ontop of the factory block according to the directions. I saw a 6" or 8" kit riding around town and noticed he's got the factory block ontop, not bottom. I only have a 4" kit. But I'm making sure under compression I'm not straining the leafs. I don't even know if the factory bump stops will actually work. Should the factory block be ontop?

[MrJohnWayne]

Personally I would not stack blocks at all. It is strange for them to tell you that. Thats just my though

[powerstruck]

i would put them on top, i believe the factory blocks are angled for driveline alignment therefore they should stay tight to the axle. i to don't like the idea of stacking blocks.

Ya dont stack the blocks but if you do I dont think it matters which is on top. My rear factory blocks are not tapered and if yours are not I would put them on top so as to retain your bump stops.

[DieselFord05]

I have my factory blocks on top, and they are tapered. I have not had any issues with pinion angle. My kit is a 5" Pro-Comp Stage II. I did have to add traction bars b/c I would wheel hop when doing a burnout.

[sloth]

I wouldn't be crazy about stacking blocks. Regardless, I'd go with however the install directions indicate.

[JBakerFX4]

Install directions indicate having the lift block ONTOP of the factory block. I'm not a fan of lift blocks, but the Skyjacker 4" rear leafs don't have any overload protection. But I might look into new rear leafs of some sort for my 4" lift kit. Think of how many SD's are running around with Lift blocks and 99.99% I see are 6" or 8" kits. Those blocks are way bigger than my 4" kit blocks.

I just looked up the Leafs, about $600/pair. You do lose your overload protection leaf. (I wonder if I could take the leafs apart and put it in there from the stock leafs....hhmm). I also found a footnote that you can remove your factory block and buy 2" bigger springs. Like for me, instead of running the stock blocks with 4" SJ leafs, I could get 6" SJ leafs and run no factory block. For a bump stop I could fab up something on the top leaf plate that mimics the "ear" bump stop. Now I'm thinking!

[Raul@Stealth Automotive]

you could always get the new springs and add some air bags in the back so you wouldn't have to worry about your overload.....