Hello Bobby im a local guy in Tacoma and im going to be building a new set of axles for my 4BT diesel bronco. Im trying to squeeze just under 800 hp and 1750 ft lbs of tourque out of it. Im building a 9" center section with dana 60 knuckles on it and wanted to know what the largest most spline available axle you make for your dana 60 birfs. Thanks [email protected] or call 206-769-6376