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**Richard** · 01-31-2023, 05:25 AM

I am an avid DIY person. Do everything I can myself as can be seen in my build thread. The drive shafts were outsourced to an experienced shop. Personally, I do not have the knowledge or experience to prevent a critical failure in this most important device. Do not have the shafts in hand yet but recall builder saying a 3.5" diameter steel shaft would be used in the rear of my SWB K10 with an LSA. About 650 hp and torque. Mind that drivetrain is 3/4-1 ton now and the ujoints are upgraded to 1410. Do not have specs in front of me but rear shaft is right around 46". Redline is about 5800 on the motor IIRC.

01-31-2023, 05:25 AM	#10
Richard Senior Member Join Date: Dec 1999 Location: Southern California Posts: 2,698	Re: Driveshaft critical speed I am an avid DIY person. Do everything I can myself as can be seen in my build thread. The drive shafts were outsourced to an experienced shop. Personally, I do not have the knowledge or experience to prevent a critical failure in this most important device. Do not have the shafts in hand yet but recall builder saying a 3.5" diameter steel shaft would be used in the rear of my SWB K10 with an LSA. About 650 hp and torque. Mind that drivetrain is 3/4-1 ton now and the ujoints are upgraded to 1410. Do not have specs in front of me but rear shaft is right around 46". Redline is about 5800 on the motor IIRC. __________________ Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746 Last edited by Richard; 01-31-2023 at 05:32 AM.