2.5" Questions

Hey guys. I've done some digging and googling and have determined that you could maybe provide some insight.

I've got a 2011 TRD OR access cab. I've installed a 2.5in rancho readylift coilover system in the front after some recommendations and reading. The damned installer said it was level without putting blocks in the rear but it clearly isn't I imagine 1.5" blocks would rectify that?

I am also interested to know if I could add the 1/4in spacer to this system to achieve a "true" 3in lift. This isn't extremely important as I've essentially only installed this system to fit 33s and rarely go offroad. Dry pavement can be a scary place so I figured... why not .

Any insight you could provide would be most helpful.