What total trim makes a 60-66 truck a custom cab

[Bowtie Bubba]

I'm the proud new owner of a 1960 all original swb step side 88,000 original miles with the 235-6 and 3 spd. I also bought a 1962 Custom cab swb fleetside (which is for sale now) and was wanting to put the Custom Cab chrome that's behind the door's on my 60 but I want to follow through with the whole thing. My question is what options made it a custom cab in the first place?

Thanks ~ Bubba