The alternator mount design offers more chassis clearance for LT4 engine swap applications. The kit can be used with existing OE (original equipment) accessories and mounting or in conjunction with the LT4 add-on hydraulic power steering kits, p/n: 20-222, 20-223 & 20-233. The components have an original equipment look and reliability while relocating the alternator in closer to the engine block for additional chassis clearance. The base kit Holley Part #20-226 is offered with a standard cast finish 105 amp alternator. Our premium kits, Holley #20-224 or #20-224BK offer the choice of a premium 150 amp alternator in cast or black finish. All three kits provide a complete, cost effective accessory solution for you LT4 crate engine with additional chassis clearance your application will need when compared to the OE option. Patent - www.holley.com/patents/