Peterbilt 389 Clutch Assist

Hi members,
I currently have a peterbilt 389 with a self-adjusting clutch and now I'm getting to the age where holding the clutch down at lights gets too hard on the knees, does anyone how we make the clutch easier to press down? Peterbilt is old-school in that they have no hydraulic or air assist. I have eaton on self-adjusting clutch 15.5 2050 part 309-701-35, is there anyone we can add an air-aid or hydraulic assist in it to make it easier to press? Like W900 now are on air clutch you can press down with your hand easily. The Peterbilt clutch makes you use all your leg power. If there any solutions please let me know? other than lubrication because I do that consistently. Thanks

 

I heard about the easy clutch, is it really a big difference in the amount of power needed to push down the clutch? they claim it's about 50% easier.

 

standing in traffic or at lights, but just in general as well just to push down as well just to put into gear