madscientist...I use a 4.10 gear w/ a 295-65 drag radial or a 29.5x10.5 slick.

Moser says they typically rate their 35 spline axles to 1000 hp. They're encouraging me to go 40 spline.

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