Complex sentence: The Side Oiler was a completely redesigned 427 cross-bolted engine block introduced in 1965, sporting a generous oil gallery down the left-hand side of the block to keep the main bearings fully supplied with oil at high revolutions.
Split into simpler sentences: The Side Oiler was a completely redesigned 427 cubic inch, cross-bolted engine block introduced in 1965. This internal combustion engine featured a generous oil gallery down the left-hand side of the block to keep the main bearings fully supplied with oil at high revolutions.