Mabbco performance short block engines include FlatTop pistons, Moly rings, a Double Row timing set, hardened connecting rod books, ARP main bolts, cast steel crankshaft, and an RV torque or 280 Muscle camshaft. Each performance short block is precision fabricated in our Tyler, TX facility and thoroughly computer tested before shipping. Performance short blocks do not require a core exchange and we can ship anywhere in the world.