The americans use 2" conduit nuts to support the 'clevis lift'. I used...nothing, just pried the shock upward and tightened the bolt.
If you want a 1" longer clevis just go and buy some, the KK's clevis is that much longer.
Now you did think about bump stops didn't you?
Making the clevis longer will make your front shock bottom out...
BTW: rock krawler tried this too...