One piece drive shaft

[PGSigns]

My 66 long bed is dropped 5" in the back and the rear drive shaft runs up hill at a pretty good angle. The drive line angles are good but I am getting a little vibration due to the steep angle. Has anyone done the one piece setup on a truck with this amount of drop?
Jimmy

[NEWFISHER]

Everything ive owned in the ro k crawl world runs uphill

The burb I just bagged runs up also. Have you set an angle finder on the trans output and the rear end pinion to make sure you are within 3 degrees of each other? Thats what works for me.

[spookylynx]

I know with Jeeps( mine is a 5.5" lift long arm), there can be relatively steep angles from the output, usually softened by a double cardin joint, but as long as the shaft and the pinion are parallel you should be OK.

[PGSigns]

The angles are set to with in .3 degrees at ride height. Issue is with the rear shaft being relativily short and the rear being about 5" above the front u-joint there is a good bit of drive shaft angle. There is a point where you need to go to a shaft with a CV joint in the front of it. We did this all the time with drive shafts in four wheel drive trucks. I think the angle you try and stay under is 3 degrees but not 100% sure. A one piece shaft would have a pretty shallow angle in a lowered truck. The overall length I need to measure.
Jimmy