58 Apache chassis rail to bottom of cab measurement

[Scottish58chev]

Hi,

I'm looking for the measurement from the bottom of the chassis rail to the bottom of the cab. I am fitting air ride to the truck and want to know the measurement with the cab fitted. Front cross member at the moment sits about 2 inches from the floor with the suspension fully compressed and i want to see if i'm going to need drop spindles to get it as low as i'd like. My own cab is in storage and is a good bit away from the house at present, plus it would be good to get the measurement from a truck with the cab actually fitted.

Thanks in advance

Calum