can any one tell me the height from the floor pan (top of chassis rail to the top of windscreen rail....thanks

Can go on that measurment......as all cars have higher or lower scuttles ....but an min of 12 to 13 inches is the normal for a screen.

its the wiper mech that dictates this dimention

The dimension I was looking for is the vertical height between the the top of the floor chassis rail and the top edge of windscreen trim.If it helps to understand why i need this dimension my vision is obstructed by the top edge of the trim.