More On...
Merlin Pro Cast Iron Blocks

The Merlin Pro comes with a 10.200" deck height and is available in a raised cam (+.400") version. A priority main oiling system is employed to assure ample lubrication to the crankshaft at high RPM operation, and the oil filter boss has been relocated to clear oil pan kickout. The Merlin Pro is equipped with solid dual pattern oil pan rails, so a stock Chevy or DRCE-style pan can be used. It comes with a 4.490" bore (hone to 4.500"), and can safely be enlarged to 4.600" while maintaining a nominal .200" wall thickness.

NOTE: Supercharged or Fuel applications should limit maximum bore size to 4.530". In using the wider DRCE pan rail a 6.800" long rod can be employed.

Even though it’s bred for racing, the Merlin Pro block accepts all Chevrolet factory Mark IV components, including fuel pump, oil filter, starter, water pump, motor mounts, etc. Whether it’s in a race car, boat, tractor or street machine, you can take full advantage of Merlin power!