speed adjustment on JD hydraulic top-link?

[MtnViewRanch]

Ok! I have a jd 4120. Not sure of the size. I guess I will post a pic. Also does it matter where the restrictor is placed. I don't have much clearance and would like to mount them on the hydraulic.

Need to know dia of the cylinder and type and size of the ports. A picture of the unit on the tractor could not hurt either. Depending on what you have, you are looking at $22-$30 for a set custom built for your cylinder shipped to you.