ok what i have is a 05 chevy 1500 extcab 4x4 with a procomp 4 inch lift and i dont want to but a whole new lift on just want to fit 37s now this is what iam looking to buy
2003-2005 Chevy / GMC 1500 Non-HD 2wd & 4wd (standard cab, extended cab & crew cab) - 3" Body Lift Kit

1999-2009 Chevy/GMC Silverado 1500 4wd - REAR 2" add-a-leafs (long)

1999-2006 Chevy/GMC 1500 Silverado 2WD - 2" FRONT Lift Kit (Coil Spring Spacers)

do you think this all will work togather and 2 do you think that ill need to get new brake lines or anything else please tell me what you think ill ned