Originally Posted by 4x404Edge
I could be wrong but im almost positive the RCD kit doesnt come with a block. It comes with a AAL witch obviously he didnt use do to him having the deavers. So that sould answer your question. Oh also i thing he did no block at all with the deavers and the ACD shackle!
RCD rear suspension calls for:
RCD 4° pinon angle shim (Your shiny "block")
These are in turn combined with the following OEM suspension:
2.5 in lift block (measured it, 2.5 not 2 inches)
Here's a little write-up I did on ORR:
For those that don't want the lift block anymore....
I'm running a set of 2.5 inch lift Deaver leaf springs (part F31). The only problem I have with running these is you can't run the RCD shims as the center pin on the Deavers is too short. NOTE: I got a used RCD kit without the RCD center pins and didn't order them when obtaining missing parts since I was running the deavers.
Ride height is appropriate with the deavers and RCD shackles. If your truck has a factory class III hitch you WILL get rubbing (minimal) from the bolt head on the hitch bracket. Said bolt head is the bolt that links the RCD shackle to the spring. NOTE: in below image bolt head is backwards and threaded portion is facing the trailer hitch. I flipped it upon noticing this, which apprenetly was the correct way to begin with (I goofed). The "clean" (black finger prints) area on the hitch is the location of rubbing.
This is a result of the length of the RCD shackle + trailer hitch bracket location + deaver prings (possibly, but I don't think they are a contributing factor)
The OEM U-bolts on the FX4 ('02) and FX4 Level II ('03-'07) WILL NOT work with running just the deavers. The threaded body on the OEM FX4/FX4LevelII (read as 8.8 31-spline rear) u-bolts is not long enough. I had to take the bushing sleeves from my OEM springs and cut them to 1.5inches to "rig" up the OEM u-bolts.
However.........there is a fix! I ordered my deaver springs from DBR (Dixon Bros. Racing for the newbies). I placed a call to them and explained my issue. Sitting in my living room, waiting for me to have money to purchase a quality torque wrench (my current one doesn't go high enough in torque for the nuts on the u-bolts), are new Deaver u-bolts. The threaded body on the Deaver u-bolts, mocked up next the OEM u-bolts, still looks not long enough, but it is VERY close. I'll be able to elaborate more on this once I have them on. If anything, stacking the OEM u-bolt washer with the new Deaver u-bolt washer should fix this. But if this is the case I'd rather either cut new threads on the Deaver u-bolts to make the threaded body portion long enough or just get a thicker washer.
Another issue to consider when running the deavers.......relocate your exhaust either before you put the lift on, or soon after. I've yet to get photos, but I just cut my exhaust at the rear exhaust hanger when I did the lift. The pipe is angled (OEM angled) as such that it has heated up the rear of the leaf spring, slightly melting the urethane leaf-to-leaf spacer and the spring to shackle bushing.