differential
A truck might have a 31 spline open rear for cheap.
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Bigger housing can hold beefier parts and MORE FLUID TO KEEP COOL. If you throw junk parts and recycled fluid in a 9" it'll break too.
The Best V8 Stories One Small Block at Time
I have broken a 7.5 with a stock TPI 350 with a carb conversion. But I've had them survive behind a build 383. Different gears was the key. 4.10s get too thin and the 2.73 sucks for dig racing but lasts the longest.







