| ARC 7/8 Journal Cranks, Specs and part numbers below. - 6589, +.450 Stroke. Relief cut on mag side for cam clearance. Keyed.
- 6591, 3" Stroke. Relief cut on mag side for cam clearance. Keyed. Use this crank for engines under 3" Bore
- 6592, 3" Stroke. Relief cut on mag side for clearance. Keyed. Use with 3" bore or bigger.
- 6593, 3" Stroke. Keyed, use with engines under 3.5 Bore.
- 6599, 3" Stroke. Keyed, use with engines 3.5 Bore or bigger.
- 6598, 3" Stroke, Splined, use with engines 3.5 bore.
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