sq tube vs PTO material driveline??

[MNorby]

I am about to move the front axle forward and clock my t-case and am going to have to build a new front drive line. I have been reading about making a SQ tube front but also can get 16 spline PTO material like they use on balers and ag equitment. Would I be better off making a fully slip PTO shaft or just use sq tube? I personally think the 16 spline would be better but would appreciate pros and cons

 

[gravdigr]

If you have easy access to the splined stuff use that. Square tube can bind under high torque when the axle moves up and down causing transmission and transfer case failure.