Original 305 Engine
This is the orginal factory 305.  The bottom end of the motor has never been rebuilt and has about 100K miles on it.  With the modifications listed below I've been able to get well into the 13's.  Here are  the stats from a couple of my best 1/4 mile runs.

Through full exhaust                              Open Headers
R/T  .575                                              .590
60'   1.907                                            1.965
1/8   8.649 @ 79.53mph                        8.605 @80.36mph
1/4   13.588 @ 99.5mph                        13.479 @ 100.95 mph

Engine

Original 305 C.I.D. 
Crane 274H cam      Adv. Duration 274 degrees    Gross Lift .450"
Crane Cams Valve Springs
Summit Hardened Push rods
Comp Cams Magnum Roller Rocker Arms
Orginal Cast Iron Heads: pocket ported, bowl blend, 3 angle valve job
Cloyes Double Roller Timing Chain


Fuel Delivery

Edelbrock Performer RPM Intake Manifold
600cfm Edelbrock Performer Carburator
Carter Electic Fuel Pump (100gph)
Moroso Cool Can
Holley Fuel Pressure Regulator


Ignition System

Accel Blue Print HEI Vacuum Advance Distrubuter
Accel  Recurve Kit
Accel Wires


Drivetrain

Richmond 4.10 Ring and Pinion
B&M 700R-4 Transmission
B&M Holeshot Non-Lockup Torque Converter (3000 Stall Speed)
B&M Ratchet Shifter



Exhaust

Hedman 1 5/8 primary full length headers
Flowmaster Cat. back exhaust system
Custom Y-pipe w/ flowtech cut outs



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