Oldsmobile 455ci / 500+HP Long Block
* Fully Balanced & Blueprinted Assembly

Peak Horsepower:
    500+ bhp @ 5500 rpm
Peak Torque:
    550+ lb/ft @ 4500 rpm
Operating Range:
    1800 - 6200 rpm
Compression Ratio:
$ CALL Aluminum Head Long Block
* Please note: All of our Engines are Custom Built per Application, and can be Custom Tailored to fit your Specific Needs. Please Allow 4-6 weeks for Delivery.

     Block: Chemically cleaned, De burred, then Stainless-Steel Airless Shot Peened to Remove all Paint & Rust. Visually Inspected, and Fully Magna fluxed. Square Decked, Blueprint Bored, Honed with torque-plates and then pressure washed. Durabond one-piece cam bearings and pioneer brass freeze plugs installed.
     Crank: Shot Peened, Performance Index Ground Factory Crankshaft, Micro Polished, with Chamfered Oil Holes. Olds crank is cross drilled for extra lower end oiling!
     Rods: Factory Steel Connecting Rods, Shot Peened for Strength, Resized with New ARP Performance Rod Bolts
     Pistons: TRW Power Forged
     Rings: Speed-Pro Plasma-Moly
     Bearings: Federal Mogul Performance Main and Rod Bearings, Durabond One-Piece Cam Bearings
     Core Plugs: Pioneer Brass Freeze Plugs
     Lifters: Comp Cams Hydraulic
     Pushrods: Custom Length Comp Cams
     Valve Springs, Retainers, & Locks: Comp Cams
     Rocker Arms: Comp Cams Full Roller Rockers, w/ 7/16" Arp Studs & Guideplates
     Timing Set: Comp Cams True Double Roller
     Timing Cover: Factory Reconditioned
     Oiling System: Melling High Volume Pump, Pickup Tube and HD Drive,
w/ Mondello Restrictors
     Oil Pan: New Milodon Street/Strip Pan w/ matching pick-up, & Milodon Windage Tray Setup
     Balancer: New Professional Products Performance Unit, w/ Degree Marks
     Gasket Set: Fel-Pro Performance
     Head Bolts: ARP Performance
     Balancing: Computer Spun Balanced to within 1 gram.
     Extras: ARP 7/16" Screw-In Studs w/ Custom Guide Plates
     Comp Cams
     Hydraulic Xtreme Energy
  Operating Range:
     2000 - 6200 RPM
  Idle Quality:
     Rough Idle
    Intake: 240 @ .050"
    Exhaust: 246 @ .050"
    Intake: .541"
    Exhaust: .544"
  Lobe Separation:
     Aluminum Edelbrock Performer RPM's
  Combustion Chamber:
  Intake Runner:
  Intake Valves:
     2.072" Performance Stainless Steel
  Exhaust Valves:
     1.680" Performance Stainless Steel
  Valve Guides:
     Performance Bronze
     Performance Serdi 5-Angle Valve Job, w/ pocket porting. Custom Porting Available!
  Intake Manifold and Bolts
Edelbrock Performer RPM Intake Manifold w/ matching Edelbrock Intake Bolts; Installed
  Chrome Valve Covers
Edelbrock Chrome Signature Series Valve Covers, Installed
  • Mallory Unilite
          w/ Mechanical Advance   $ CALL
  • Accel
          w/ Vacuum Advance   $ CALL
    Stock Type Unit = $ CALL

    Larry's Auto Machine

    175 Leonard Drive
    Groton, CT 06340

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