Correct. This is not full OME, but OME front with toytech add a leaf. The front is the OME struts, OME springs of your choice, you have to use your stock tophat(you usually do anyway). The rear is OME shock with an add a leaf, which is not nearly as good as a Dakar Pack but will more properly( than other aal's or blocks) get you load carrying capacity(no change with blocks) and height. I would not recommend lift blocks. The rear aal will not last as long as a good full pack but I have had good luck with full length aal's in the past. If this is still a little too much, the 5100's will get you the front lift you are looking for, I just think the OME is much higher quality and lifts the truck more properly(whatever a proper lift is).
I dont know what the front lift height will end up but would suggest contacting ARB USA to ask thier advise. They suggested 884 springs for my 4cyl and no bumper.