Why did the tranny case break. I've gone 8.50's with stock powerglide cases and others have gone a lot faster than that. How's the pinion angle.

1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time