Xram53,
"Tim, above you say: "The 1954 Deluxe Cab Equipment option was supposedly only available on 5-window Chevrolet cabs..." It's my understanding that the 5-window cabs were part of the deluxe equipment option. But, a 5-window cab does not necessarily imply a deluxe cab, as the corner windows were available as a separate option (RPO 387)."
What I meant to say was: The 1954 Deluxe Cab Equipment option (RPO 430 and 431) was supposedly only available on the 5-window Chevrolet cabs... This option contained the rear corner windows as part of this RPO package and thus, this package only came with a 5-window cab on Chevy trucks. But, it seems that the interior color combinations might have been available on 3 window GMC trucks.
There was also a De Luxe Equipment option (RPO 390) that had 5 windows and less bling-bling than the De Luxe Cab Equipment option (430 and 431).
And, as you state, there was the Rear Corner Window option (RPO 387) that only provided the two rear corner windows.
Tim
