BEST WAY TO LOWER A 77 CHEVY

ok just picked up a 77 chevy c10 for a daily driver. wanna lower it about 4" in the back. whats the best way of going about doing it? most likely using blocks

REALY , REALY BIG GIRLS !! AND LOTS OF THEM !! LOL YOU WILL LAY BUMPER !!,,
4REAL, 2"DROP HANGER AND 2" SHACKLE

^^^agreed^^^^ or a flip kit if your leafs arestill ontop of the axle

FLIP KIT WILL GIVE HIM 6"

i got 2" shackles on it already. need more not low enough for me. so most likely a flip kit. i saw fbi has them in 5". probably my best bet???