Engine Top End KitEdelbrock part #2087 Performer RPM Top End Kit is designed for 1968 79 Big Block Chrysler 440 V 8 engines. This Top End Kit produced 482 HP & 528 TQ on a 440 c. i. d engine with 9. 27: 1 compression. The kit delivers improved performance in street applications from 1,500 to 6,500 rpm range. The kit includes RPM Air Gap intake manifold, Performer RPM cylinder heads, hydraulic cam and lifters, timing chain complete bolt kits and an Edelbrock gasket set.