30 spline Axeles in a 8 3/4

I'm running Currie 30spline in a spooled 3.73 centre.
Best 60ft is 1.62
Car is 3500lb with 303hp at the treads.
Stripped a 741 crownwheel and pinion a year ago but the axles looked to be OK.
Car has now done 379 passes and sees it's share of street use as well.