bagging a square body dually burb

[87 dually burb]

little back ground 87 3/4ton 454/400
flipped in rear with 3" blocks (pulled over load leaf)
pulled springs and bump stops in front
still have to add 3" djm spindle

pic of rear before blocks added


front no springs or bump stops 2" to innerfender well


only full pic I have rite now will be on wheels tomorrow

what kind of lift can I get from a bag in the front running 3" spindles
going to add 1" bump stop for it to sit on when airred out in front

rear I want a bag over axle setup same ? what lift can I get with it
same 1" bump stop to rest when airred out

never bagged or dropped a truck this low my biggest issue is I want a good ride and plan to make many trips up and down the east coast with it
want a cheap but reliable set up for now just want to "t" the air line and run them to rear so a full air kit it out the pic for now just want bags and brackets and cups I guess
have 2 40lb co2 bottle for later use