IRONRACE SERIESSTEEL10.60

Dart Big Block Chevy blocks are available in various configurations, including MRKIV, SS 396, GenV, GenVI, and Big M/Sportsman. These blocks feature true priority main oiling and are offered with 9.800" or 10.200" deck heights, and bore options such as 4.250", 4.500", 4.560", and 4.600". They come with either ductile iron or billet steel main caps. Some versions, like the Big M Pro Iron Blocks, offer deck options from 9.600" to 11.100" and raised cam locations to clear stroker crankshafts. Dart also offers aluminum Big M and Big M Race Series blocks made from RMR Cast Aluminum alloy for superior strength, with standard 9.800" or 10.200" deck heights and options up to 10.400", raised camshaft locations, and ductile iron sleeves.