What Year Cab ?

[GOPAPA]

I am trying to find out what year cab I have so I can order a windshield and Gasket .. I am planning on a Precision Gasket and either a PPG or Pilkington glass .

What I do know is this :

I have no Vin Plate on door Frame

It does not have a air vent in the door jam.

It does have holes in the roof area above the window for a rear view mirror ,,but not sure if they are factory or not.

It does not have a raised area where these hole are for the rear view mirror.

It has a foot operated E-Brake.

It has a raised area for the gas Peddle,,I have heard that there are two different size raised areas depending on year?

Are there a difference in the size of hole or area of the hole depending if it was a cable throttle or a rod throttle?

If there are other identifying features that you know of that will tell me what year this cab is I would appreciate it.. Gopapa