Moeman, why don't you post your question separately so that this topic doesn't become confusing?
Looking at CPP's website, for E4754M2IFS-K, it says:
Instructions:
1. Start with the truck or frame securely on jack stands with the frame set to the same rake angle as the truck will be when completed.
(Typically, the frame is at a 3-degree slope so the rear is slightly higher than the front.)
If the suspension is installed at the wrong rake angle, you may not be able to align the front end with the correct amount of caster.
Are you using jack stands? Use something solid underneath the jack stand base to make final height adjustments.