I measured this all up tonight. The rod eye was pretty chowdered out, looks like someone changes out the eye screw, so the overall lengths are a bit rough but that doesn't matter as much since the rod eye has a threaded adjustment.
Here is all the info for future reference:
Extended force 650 Newtons [150 lbs]
Rod Diameter: 10 mm [0.393"]
Body Diameter: 21mm [13/16"]
Eye to Eye with Rod Eye - Retracted ~185mm [~7 1/4"]
Eye to Eye with Rod Eye - Extended ~285mm [~11 1/4"]
Total Stroke 110mm [4 1/4"]
Rod Thread M8x1.25
Cylinder end pivot eye: 3/16" thick plate, 8mm dia hole [5/16" dia]
Rod Eye ball stud: 1/4-20 thread - but this was butchered on.
There's a couple things that I can't find an exact match on so I'll head down to the laser soon and check the install clearances before I go ahead and order anything. I'll try and get a cheap domestic replacement instead of some obscure Chinesium part.