Thanx fellas...
Chip Im surprised your running with a 3" DS at nearly 4K lbs and 1K+HP on the spray.
Thats a hell of a good Ds you have; is it chrome moly?
I have no idea, lol. Sheppard's Truck & Driveline Service in Florence, SC, made it for me.  It's one of those things that I had made in 2003 when the car was making about 600 hp and it's held up this long. That shaft got tweaked when the 727 exploded in 2008, so I had them make me another one just like it. No problems yet, but when/if it does break...I'll go bigger.
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
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