I had picked up 3 Front shafts and had retubed and with 8" spline... both front and rear show about 2-2 1/2" with 4" lift.. on recenterd axles... entire suspension was reworked with 52" Springs all the way around... with Axles dead centered on wheel wells... Because of my doubler as well, I got to set it up that both front and rear will interchange.. and the 3rd is a spare for either, in the event i break another one... ( hence the avatar pic...)
i have to concur with Sandman.... you have to have some spline showing at ride height... if not.. your outting too much pressure at yoke and at transfercae,, which in turn stresses the mounts and entire Driveline... thats why I went with 8" slips.. as so i wont lose strength at fully dropped.... Even at Stock height the front shaft shows a little for compression....
my advise... leave Front shaft out... pull measurement.. yoke to yoke, then position truck iin a ditch or on something to articulate the suspension.. and pull another... Ideally you will want 3 measurements... compressed, normal ride height, and fully Dropped... take those measurements, and see if your drive shaft can match it... that way, you will know for sure if you will end up having to modify yours... and save you from learning the hard expensive way...
Thats what i had to do...
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