GT150 Ld De Michelis Kit and headA true bolt on performance cast iron kit for D and Ld engines pre 1956. The kit includes cylinder, piston, head, reed valve. The manifold is designed for use with PHBL24 carbs but other types may fit. This kit delivers exceptional performance and greatly increases the fuel economy by permitting the use of longer gearing and reducing the need to change down for inclines. Importantly, the use of this kit requires the crankcase spigot to be machined to