Drive Shafts

[Mattman2010]

Here is the deal, I just converted my 2wd Crew Cab Dually to a 4x4 Single Rear wheel. I need to get a drive shaft shortened or lengthened to make me around an 88 inch rear drive shaft. Here is my delima, I have a k20 drive shaft with a slip yoke that fits into the rear of my transfer case, it is 59 inches long, and then I have a two piece drive shaft with the carrier bearing that is 38 inches from the end of the transmission to the carrier bearing, and 65 inches from the carrier bearing to the rear axle.

Which drive shaft would be better to shorten or lengthen? Would the k20 drive shaft be to long at 88 inches? Or is it worth shortening the front drive shaft of the two peice to 21 inches and put the slip yoke on the end of it?

The k20 has the 32 spline slip yoke and the correct size U-Joint to fit to the rear axle (The rear axle came out of a k20 as well) I am sure I would have to get conversion U-Joins for the two piece to get it to mount up to the slip yoke.

So what do you think would be better? To run a long drive shaft, or to run the two peice? I know the shorter it is the stronger it will be, but I dont think that the longer one would be to bad.

Thanks, Matt