I put a 6" block and add-a-leafs in my spring perch by myself. You can just rest truck on stands, and keep jack under pumpkin. put tires under drums/rear disc to keep rear from hitting.
good write-up none-the-less
ive done pretty much the same thing by myself a couple times... installing and removing a leveling kit on my last 02 z71 and on my dads 04 duramax
Wills77
06 Silverado 5.3
20's wrapped in Nitto nt420s, airaid intake, k&n, magnaflow duals, custom grill, 2" drop shackles, cowl hood, vette servos, autotek 2000 watt amp and 2 hifonics brutus 12's....
05 honda trx450r #77
Fully built MX quad