The balanced rotating assembly (typically includes crankshaft, pistons, rings, connecting rods, rod bearings, and balancer) featured in this engine:

• 3.484" stroke crank one piece rear seal
• 5.7" forged big beam rods with ARP rod bolts
• 9 1/2 to 1 compression hypereutectic flat top pistons

More special features of this engine include:

• Seasoned 4-bolt main block with one piece rear main seal to prevent oil leaks
• Block has provision for mechanical fuel pump
• Engine comes with automatic transmission flexplate - 14" diameter, 168 teeth
• New Hydraulic flat tappet split duration cam with .509"INT/.512"EXH valve lift
• Vortec heads with 64cc fast burn combustion chambers and 1.940"Int/1.500"Exh valves to complement the high velocity port design. According to GM the Vortec head with it's raised port design outflows the bowtie heads right out of the box!
• Hardened exhaust seats for use with both leaded or unleaded fuels
• New 1.250" High performance springs set up to match cam
• New High temperature valve seals
• New Valve guides
• New Roller tip rocker arms
• New Hardened push rods
• New Perfect Circle rings
• New Double row timing set
• New High volume oil pump with welded big pickup screen and steel drive shaft and steel guide
• New Revolutionary 1-pc design molded rubber oil pan gasket with load limiters to prevent over-tightening and higher temperature resistance than standard cork-rubber gaskets
• New Brass expansion plugs
• New Edelbrock RPM Air Gap Vortec aluminum intake manifold for use with square bore carb (not included). This unique design separates the hot engine valley from the air/fuel mixture for a cooler, denser charge and more power throughout the rpm range
• All parts are painted separately before assembly for that show quality look

This engine comes completely assembled with oil pan, driver side chrome dipstick and tube, timing cover, harmonic balancer, valve covers, and an Edelbrock RPM Air Gap Vortec aluminum intake manifold.