I found quite a number of references to this. It appears it was and still is a very popular project at the engineering college level. There are also several grabcad files available for download if one is subscribed to that.
This was the best set of actual drawings that I found, although it is minus the manual handle (an air actuator has been substituted). Wouldn't be hard to figure that part, though.
I don't know if it's cool to use these, they're part of a college curriculum, but I didn't have to do anything fancy to find them. Just searched "arbor press project plans" and here these were
http://www.nashua.edu/paradisem1/IED 2007-08/IED_2007/Unit_2/Unit_2/Activities/Project2_3_1Arbor_Press.htm
-frank