Complex sentence: Blocks made of both iron and aluminum alloys are available in stock or modified configurations as well as with increased deck height to allow longer stroke or more favorable rod length ratios, providing the ability to make engines (or larger).
Split into simpler sentences: Blocks made of both iron and aluminum alloys are available in stock or modified. Configurations and also with increased deck height to allow longer stroke or more favorable rod length ratios, providing the ability to make engines (or larger).