K1 Technologies AMC Crankshafts

  • Manufactured from forged or billet premium 4340 steel
  • Engineered specifically for high-stress racing applications
  • Nitrided for improved strength and bearing life

  • Large fillet radii for improved strength
  • Straight hole oiling system for improved lubrication
  • Size tolerances held to +/-.0001".

AMC 360 / 390

Part Number Former P/N Description Stroke Main Journal
Diameter
Rod Pin
Diameter
Minimum
Rod Length
Flange Bob Weight
(Grams)
Weight
(Lbs)
Footnote
002AAD400 390-4000LB6B AMC 360/390 Billet Crankshaft. 2.100" SBC Rod Journal 4.000 2.750 2.100 6 Bolt - Pre '71 1950 Call