like the other guy said...Belltech DOES sell a 2/3 lowering kit.
i actually HAD the same setup on my truck about a year ago. the 2" lowering coils really didn't drop the front end a full 2" like they were suppose to so i was a bit unhappy. it only dropped my front 1.5" because they were actually meant for the ext. cab models which i wasn't told until AFTER i installed them. oh well. the 3" blocks were fine though. they're still on my taco but instead of those belltech coils...i have 3" coils from chassis tech up front which work perfectly fine. they were specifically for the standard cab 2.4L models. truck sits fine now EVEN THOUGH my back still sits 1" higher than the front but i plan on going lower...maybe a 3/4 or 4/5 drop. hope this info helped...later.