You need the balancer if you are going to swap whole kits. The truck, Corvette and Camaro/Firebird are all different belt offsets.
I can help with the ICT Billet stuff as we sell their products if you have questions.
The 551569-3 Alternator P/S bracket kit has the following stipulations. Plus, if you hate it, JEGS will take it back.
Requires: **105 amp ONLY, alternator (19244779)
Requires: Truck/SUV (or 2010-15 Camaro) crank pulley (12634105)
Requires: 1998-02 LS1 Camaro power steering pump & pulley (63105 & 12559885)
Requires: 1999-06 LS Gen 3 Truck Water Pump (252-845), or 2010-2015 Camaro Water Pump (19207665)
Requires: LS Truck (3-bolt) Belt Tensioner
Not compatible with Gen 4 "truck", LS2, or LS3 Corvette water pumps
Includes: Alternator Bracket Kit
Power Steering Pump Bracket Kit
Belt Tensioner Relocation Kit & Pulley
Uses 680K6 Belt (68.0")
VVT equipped engines must use LS3 Camaro Water Pump
If needing to extend your alternator harness connection, use ICT# WEALT30-36 (4-pin) or WEALT40-36 (2-pin)