How fast on 4 lug ford 31 splines??

I was running mid 10s on stock 28 spline 4 lugs with a c4 and blower motor, but I dont have a trans brake. Never had an axle break.
 
The only 4 lug I have seen brake was on a renegade stick car dumping the clutch going mid 10's but thats pretty violent... broke the studs
 
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