50 State Legal Replacement 1970-1990 - GM Big Block Compatible 454 c.i. Engine - Long Block

This engine is designed and manufactured to factory specs for the specified vehicles below. It's manufactured using tighter machining tolerances, higher quality components, and finer balancing of the rotating assembly to make this engine better than the original while still meeting the description of a “replacement” engine.

View the Application List HERE

Block:

• BluePrint Engines High Strength Cast Iron Block, 454 BBC
  
• Manufactured and Machined in the USA!
• Mech Fuel Pump Provision: Yes
• 1-Piece Rear Main Seal
• Standard Deck
• 4.250" Bore
  
• 4-Bolt Main

Rotating Assembly:

• 1 Piece Rear Main Seal
• Cast Crankshaft
• 4.000" Stroke
  
• OEM Type 6.135" Connecting Rods w/ 150,000 PSI Bolts
• OEM Spec Pistons
• Externally Balanced Front - Internally Balanced Rear

Cylinder Heads:

• Iron Heads

Cam Specs:

• Cam Type: Flat Tappet
• OEM Spec Per Listed Vehicles

Ignition Timing:

• OEM Specifications

Also Includes:

• Timing Cover
• Valve Covers
  
• Dipstick

Notes:

• Designed as factory replacement long block for specified vehicles and year ranges, using OEM specification parts. Customer to re-use existing intake manifold, ecu (if equipped), exhaust, fuel system etc. Modification or replacement of provided tinware, and minor accommodations such as dipstick location may be required.
• Specifically designed as an OEM spec engine to meet emissions requirements of the specified vehicles, to meet the criteria of "replacement engine" in all 50 states.
• MUST see attached application list above for fitment.
• This engine features a 1-piece rear main seal crankshaft. If replacing an engine that was originally a 2-piece rear main seal, a new flex plate, or flywheel, will be required.
• Features External 42.5 oz. imbalance. Recommend BluePrint Engines flywheel 14096987 or BluePrint Engines flex plate 399973 .