To enable the larger size pistons and cylinder heads to fit into engines of over 1641cc the engine casing and cylinder heads require machining to accommodate the extra bore size.Higher Performance - Long BlockSKU: 0703£2,800.00PriceQuantity*Add to BuildLong block engine includesNew: Barrels & pistons, Cylinder heads, Alternator, Distributor, Fuel pump, Remote oil filter, Spark plugs, HT leads, powder coated tin-wear.