I have a '51 carryall that didn't have side windows, so I started putting them in. BTW this discussion has helped me tremendously thanx for all the info and tips!!! Since I have started I feel I have made some progress. I have 1 Window in and working to get the second one in place. I bought the "stainless steel window lock springs from Jim Carter part#WI1486." I think I found out how these works, please jump in here because I am a newby, if I've got it wrong "Any" input would be welcomed to help me do it right.
Between the stationary and slider window, in the bottom of the window frame on the body edge, there is a slot. The slot corresponds to the width of the spring, below on the body there are 2 holes. These holes match the threaded holes in the spring. I am guessing the spring acts as a lock, sticking slightly inside the leading edge of the slider. This blocks the window from being opened from the outside. To open the window you pull the springs away to slide the window past it. This seemed to function, the only issue is... the spring rubs against the inside of the slider window & this will eventually scratch a line on the the bottom edge of the slider glass. Have I gotten this right? As I mentioned before.. this is all new to me, I could have imagined this would work and could be way off base. Any additional info would be warmly welcomed...Thanx in advance.