Help please choosing suspension my 68 Camaro

[s10pro]

1968 Camaro Rs setup is fresh ls2 stock bottom end ported heads,turbo cam, springs pushrods,Holley intake 93 mm t body s480 t4 83mm turbo,rebuilt 4l80 with yank power adder converter 3400 stall. Car is a cruiser not racing it in track or auto cross I just drive it with wife and kids,car is turned down makes 596 on 10.5 lbs of boost. Currently the suspension is 2 inch drop Hotchkis is springs in front .1 1/2 drop Hotchkis drop leaf and blisten shocks c 5 brakes front Ls1 rear brakes 12 bolt 350 gears .i bought the dse 3" drop leaf min tub kit not installed yet . I bought tires already bfg kdw 335/30/18 rear and 275/35/18 can I fit these with dse leaf kit , rear end is not a issue I sold the 12 bolt plans of going the shortened 9inch rear end