Callies Big Block Ford Magnum Crankshafts
Magnum
Standard Features
* Average Weight for 4.750 in. Stroke = 78 lbs
* Gun Drilled Mains
* All Rod Journals Lightened
* Stroke Availability from 4.150 in. to 4.750 in.
* Single 3/16 (Align-Ease) keway with lead in Witness mark
* Short Damper fit (High Performance Style)
* Heat Treatment = Ultra Case Deep Nitride
Special Options
* Full Internal Balance
* Dual Post Keyways