GM 355 Base Engine • Cast Iron Vortec Heads • Flat Tappet Cam • 1pc RMS
BP3550CT1 - GM 355 Base Vortec Heads
HP & Torque: 385 HP / 405 FT LBS
Compression Ratio: 9.5:1
Cast Iron Heads
Hypereutectic Pistons
Flat Tappet Cam
Cast Steel Crank
Part #: BP3550CT1


4-bolt main 1-piece rear seal block
(w/passenger side dipstick only)
Square and parallel decked
Align honed on computer controlled machine to within .0002 straightness and roundness
Cylinders are sonic tested

Rotating Assembly:

Cast iron crankshaft
Keith Black hypereutectic pistons
Chevy heavy beam rods with 150,000 psi bolts
Hastings Moly rings
Balanced rotating assemby
Melling high volume oil pump
Flat tappet hydraulic lifter camshaft
Heavy Duty double roller timing set

Cylinder Heads:

Cast iron "vortec" heads
1.25 diameter valve springs
Hardened retainers and springs
2.02 swirl polished intake valves
1.60 swirl polished exhaust valves
1.5 long slot, stamped steel rockers
Hardened push rods

Cam Specs:

Cam Type: Flat Tappet
.480 Intake .486 Exhaust
224 Intake / 230 Exhaust duration
@ .050 - 112 degree lobe separation

Ignition Timing:

34 degrees total at 3500 rpm

Also Includes:

Professional Products dual plane satin finish intake manifold
New chrome valve covers
Brass freeze plugs
Dyno test results shipped with engine


30 month / 50,000 mile


BluePrint Engines recommends 91 Octane for this engine and a 1800-2200 RPM stall converter.

Not for use in pollution controlled vehicles.

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