Remove an AAL if installing a new lift?

I already have a 3 inch lift up front and a 1.5 AAL in the back. If I decide to buy a 6 inch lift and it comes with a rear 4inch block, can you remove a single leaf to then install the block or do I have to buy new leafs? Thanks so much!

 

Are you sitting level now? If it were me, I would try a two inch block with the current spring set up you already have. Because it will come up... blocks have a draw back in a suspension. The spacing block acts as a leverage arm against the spring under acceleration and will create a situation call spring wrap. So a 4" block would have more leverage than a 2" block and make the spring wrap worse. Personally I wouldn't sweat a 2" block set and because the cost is so low you could give that a try- target would be to put new leafs in the rear. Locally I have spring shop, you could drive up and they could walk you through adding extra leafs to your pack or build you new set for a reasonable price.