S-F AHH! good question...it is for easy ID for myself as to the postings that are related to my rebuild.
Billyg I have looked into that and it is the finish issue of both sides, thru deck usually it is a raw finish on inside the compartment and usuall the deck is thin compared to wall of TC...yes there are portlights that may do the job, but I'd really light a deadlight (non-opening), all is not lost yet!
Stopped by a hardware and there is a jumbo door security peep item that could work for the cab look see, will keep that in mind.