380CID A/FX Race Engine

The 380CID A/FX race engine long block in April 2011:



The H-O Racing Specialties "380" Engine was based on a 1958 Pontiac 370CID engine from a local wrecking yard. It was special ordered by Selden Ruwwe of Bourbon, MO and executed by Craig Hendrickson and Kern Osterstock in 1975 to drag race in Selden's 1963 Tempest A/FX clone.

Some technical highlights about the H-O Racing "380" pictured above:

  • Block was a 1958 370CID bored 0.060" over (4.1225").
  • Crankshaft was a stock 1958 370CID (3.5625" stroke) forged unit ground .010/.010.
  • Crankshaft main size was stock 2.625".
  • Valve springs were Crane with titanium retainers and hardened split locks.
  • Cam and rev kit was Crane Cams solid roller.
  • Roller rockers were Erson.
  • Rocker arms were Norris steel 1.65:1.
  • Pushrods were custom length D&D 3/8" diameter chromoly.
  • Guideplates were custom 3/8" clearance fabricated by Kern.
  • Stud girdle was custom fabricated by Kern Osterstock.
  • Timing gear drive was by Pete Jackson.
  • Rods were stock length (6.625") Carillo steel H-beam.
  • Pistons were custom BRC domed forgings with tapered pins.
  • Heads were 1970 RA IV (#722) supplied by Ruwwe and ported by Mullen & Co to H-O specs.
  • Intake manifold was a custom built Version 2 aluminum Tunnel Ram. designed by Craig and fabricated by Kern.
  • Engine mounts and starter mount were fabricated by Kern to fit a 1963 Tempest.
  • RPM redline was 8,300RPM and horsepower was about 720HP @ 7,800RPM.