Pitman & Idler Arm will HD Parts fit non HD truck

[mxz905]

It's time to replace the original pitman and idler. The truck is a 2005 Sierra 1500 Z71. Moog parts seem to have a good reputation, in pricing out parts I can go with the HD pitman and idler for only a few buck more. seems to make sense to me and fitment charts online seem to imply and HD pitman and idler will fit a non HD truck. part numbers are below. Question to the group is are these truly interchangable and has anyone put the HD versions on their non HD trucks?

 

Pintman K6536HD

Idler K6534HD

[newdude]

The splines on them are different. Typically the HD trucks use the 33 spline arms, and the 1/2 trucks use the 32 spline arms. The gearboxes where the pitman splines to have the difference as well. HD are usually 33, 1/2 ton are 32.

[mxz905]

I can match the splines across the HD and non HD parts. I've confirmed against my VIN that mine is the 4 spline variant