From the special, orange powder-coated 572 block, aluminum rectangular-port heads, and 12:1 forged aluminum pistons, the ZZ572/720R long block includes all the features of the Deluxe, minus the water pump, carburetor, intake manifold, distributor, and spark plug wires. This gives you the option of using a carb you already have. GM Performance Parts integrated, durability-tested, and validated this combination and determined it works best with the Deluxe version's 1090-cfm Demon four-barrel carburetor, tall-deck single-plane intake manifold, HEI distributor, aluminum short-style water pump, and 8 mm spark plug wires.