RPM 3000 3500 4000 4500 5000 5500 6000  6700   Torque 499 483 515 533 564 524 528 502 H.P.   393 457 537 579 603  626  280 321

420cid CNC 300 217cc Cyl. Heads 11.0:1 Mighty Demon 825 cfm MSD  Distributor 34° Timing Comp Cams XR286R Mech. Roller Cam 248/254 @ .050 Dur .614/.621 Lift with 1.6:1 Rockers 1 3/4" Headers 91 Octane Pump Gas Edelbrock Victor Jr.

 As Tested By TSEC on SuperFlow Dyno

RPM 3000 3500 4000 4500 5000 5500 6000  6400   Torque 537 515 558 594 601 586 551 524 H.P.   424 509 571 613 629  639  306 344

420cid AFR 210cc Cyl. Heads 11.8:1 Mighty Demon 825 cfm MSD  Distributor 34° Timing Comp Cams XR286R Mech. Roller Cam 248/254 @ .050 Dur .614/.621 Lift with 1.6:1 Rockers 1 3/4" Headers 91 Octane Pump Gas Edelbrock Super Victor

400 Blocks Do Tend To Run Hot If There Is Insufficient Air Flow Though The Radiator. Be sure You Have An Effective Cooling System. Aluminum Radiators Have Proven Effective. Balancing The High And Low Pressure Sides Of The Cooling System Helps.   Using a 4" stroke in a 9.025" block reduces piston and ring life approx. 35%    Standard  DECK - CAM - OIL PAN 4.155 X 4.155 X 3.875 X Pi X 8  = 420.33cid 4.185 X 4.185 X 3.875 X Pi X 8  = 426.42cid 4.155 X 4.155 X 4.000 X Pi X 8  = 433.89cid 4.185 X 4.185 X 4.000 X Pi X 8  = 440.18cid

  $680

Exclusive MILLER TWIN RIB™ "In-Line" BILLET 7075-T6 Aircraft Grade Aluminum Rocker Bodies & Stands; 8620 Shafts & Grade 8 Cap Screws & Jim Miller/ARP Fasteners.

  Jesel Sportsman Rockershaft Option $750

Tech Article

Stud Girdles starting at $120 

The Patented MEI STUD-BRIDGE™ revolutionizes the concept of what a "stud girdle" was intended for: securing the rocker arm mounting studs from flex! There is no system close to accomplishing what the Patented STUD-BRIDGE™ achieves. It's no wonder. One look at the innovation and design shows clearly what individual locking bolts can do, compared to the sandwich style gripping of smaller bolts across two bars, typical of the traditional stud girdle designs. If your class of competition requires that you run stud mounted rocker arms, of any brand or type, then there is no other system to choose in assuring your valve train is locked in place with the ULTIMATE rigidity!  $300

  STUDS $125

 ARP HEAD BOLTS $65

Fel-Pro Performance Gaskets $110 

COMPLETED LONG BLOCK starting at $6250

Melling Racing Pumps $75    High Volume Pump Kit $65 ACCELERATION BAFFLE  $15               $35    ALUMINUM TIMING COVER  $35                                                         VALVE COVERS    Chrome Bolt Kits $75

ELBROCK MANIFOLDS Work Great EDELBROCK PERFORMER RPM AIRGAP VICTOR JR    Open Plenum Manifolds make more horsepower above 5500RPM. Devided Plenum Manifold make more torque below 3500RPM         DART MANIFOLDS Make the Most Power   PROFESSIONAL PRODUCTS Cost Less SEE PROFESSIONAL PRODUCTS MANIFOLDS   PROFESSIONAL PRODUCTS CROSSWINDS   PROFESSIONAL PRODUCTS HURRICANE      Lost Cost Import Pans $80  Americam Made Oil Pans $180  Low Ground Clearance Short racing pan suitable for Corvettes, has baffles and scrapper option