Tech Tip - Oiling System

Features:

• Ductile iron 4-bolt mains caps for ultimate bottom-end strength
• Siamesed extra thick cylinder walls to resist cracking and improve ring seal (minimum .300 in. thick with 4.625 in. bore)
• Uses +.300 in. tall GM Gen VI style lifters
• Crankshaft tunnel has clearance for a 4.500 in. stroke with steel rods without grinding
• Main bearing caps have splayed outer bolts for extra strength
• True priority main oil system lubricates the main bearings before the lifters
• Stepped main oil gallery (9/16 in. to 1/2 in. to 7/16 in.) increases the flow of oil to the crankshaft at high RPM, and front oil crossover eliminates internal oil leaks around the distributor shaft
• Lifter valley head stud bosses prevent blown head gaskets
• Dual oil pan bolt patterns fit standard and notched oil pans
• 220 BHN cast iron block material
• .842 in. lifter bores
• Press-fit freeze plugs
• 2-Piece rear main seal
• Includes block parts kit 301-32000002 - coated cam bearings, freeze plugs and dowel pins

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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