Description:

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.

FITS Various 1989-1995 Chevy / GMC Vans Originally equipped with a 7.4L Engine. See application list below to confirm fitment.

View the Application List HERE

Block:

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

Rotating Assembly:

• New BluePrint Cast steel crankshaft
• 4.000" Stroke 
• 4.250" Bore
• OEM Type 6.135" Connecting Rods w/ 150,000 PSI Bolts
• OEM Spec Pistons
• External Balanced

Cylinder Heads:

• Iron heads -3/8 Accessory Bolt Holes on BOTH HEADS

Cam Specs:

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

Ignition Timing:

• OEM Specifications

Also Includes:

• Valve Covers
• Oil Pan
• Timing Cover

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. 
• This engine has 3/8 accessory mounting bolt holes on BOTH HEADS. if your engine has 7/16 bolt holes you will need to source new mounting bolts/possibly sleeve down accessory bracket holes. 
• Must confirm fitment with application list above. 
• Features External 42.5 oz. imbalance. Recommend GM flywheel 14096987, or TCI flex plate 399973.