My 727 still has stock shafts in it. Haven't broken one yet, but it wouldn't surprise me if it broke on my next pass.
3850 lb car, 575" hemi on nitrous...Mid 5s at 127 mph in the 1/8. Should be somewhere in the 8.6-8.7 range in the 1/4, I just haven't run at a 1/4 mile track in a while.

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CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax