You can use the stock pto with the 3053A. I watched Barrman shifting his NV4500 at the FE- it appears much smoother than the spicer I have in my truck in the throw and also clutching. My spicer uses what is best described as a triple hinged z bar to the clutch with a 6.2. It may be different the 4Bt. It can be a workout. I also powershift as well.
But- it is stout and I don't drive it every day. And it works, so I'm not changing it anytime in the forseeable future- gonz
Come and take it
Go work at joann fabrics if you can't shoot a gun