Well, I can tell you that with Moser Axles being as affordable as they are, why take the chance. They usually break at the step just up from the splines. I broke mine with a stock max wedge on drag radials, installed the Moser's and no more breakie breakie. I also installed them in my 70 Chally with a small block magnum crate. I say Moser or another alloy axle of your choice....