Fits Chrysler 8 bolt crank applications through Gen 2, Center hole diameter 2.160?, Internal balance, 143 tooth ring gear, Clutch bolt patterns: Chrysler 10.5?, 10.95? clutches with 11.625? bolt circle, 3/8-16 thread, Chrysler 11? clutches with 12.625? bolt circle, 3/8-16 thread, Ford Long Style 11? clutches with 12.375? bolt circle, 3/8-16 thread.