depends on the YEAR.
the easiest way is probably to lower the back 2"...but then when you
load something in the back or tow, youre gonna have a squat issue.
if you have the coil front suspension (vs. the 99-04 leaf) you could
add some 2" spacers to the front...but again i suspect thats more work
than lowering the back.
if you have a coil front end you could be at a critical lift limit, shock length,
brake lines etc....when i look at the parts list (not including shocks) for an 05+ i see...
2) Radius arm drop brackets,
2) Front coil springs,
1) Pitman arm,
1) Carrier bearing drop kit,
1) Radius arm support bar,
2) Brake line extensions,
2) Front ABS extensions,
2) Front sway bar drop brackets,
2) Front sway bar endlinks,
2) 5.5" rear lift blocks (replaces factory blocks),
4) Rear u-bolts,
2) Front bump stop extensions
it makes me wonder if the parts you have on your truck have enough
margin for 2 more inches of lift...at the front.
