DART Big "M" Cast Iron Block
BB Chevy
Dart has reinvented the Rat motor!
The lubrication system has been re-designed to create a true "priority
main" system that oils all the main bearings before the lifters
for extra reliability. The stepped main oil gallery (9/16" to 1/2" to
7/16") increases the flow of oil to the crank at high rpm, while
the front oil crossover eliminates internal oil leaks around the distributor
shaft. The result: more oil at the bearings and pushrods where it's
needed, and less power-robbing crankcase windage.
Big-blocks are prone to head gasket failure in the long spans between
head bolts.
DART has added two head stud bosses on both sides of the lifter valley
to take the place of the "missing" head bolts. The bosses
are slotted so you can use studs instead of the hard-to-install bolts.
The Big "M" is engineered to be the strongest, most reliable,
and easiest to build big-block on the market. It's time to step up
to the Big M!
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